Ohh fun reading on the forums, this is why formal competitions can be good

Can't watch the vids until later when I get home from work, but I can imagine how the fights went. Have enjoyed reading the thread much though.
First off, I think a mistake of warbands is having the swing speed toggle. I think it took me a while to understand that timing has the largest part in how you attack one another, and there is no way the devs could have known during development. So here you have this game that bases a lot on timing, with a switch to vary the timing at the drop of a hat.
I guess it is like why in CRPG you have to stick to the basics because you never quite know what speed a weapon is going to come at you. The same with going between fastest and medium. At a lower level it doesn't matter, but as you get more practiced, lots of things that you hard wire into your reaction set (at least for me) don't work out quite the way they should. I guess over time you can learn both, and learn to switch gears, but honestly the game should ship with a fixed swing speed, whether its fastest or med.
As to the video looking boring, I think that comes across in a lot of warband vids. It is just more intense to play it than to watch it, esp when its from 3rd person (is this one from fixed 1st person though?). Either way, when you play, your brain is always doing much more than just feint / swinging, it is evaluating current and future states and is much more active, leading to the feeling of intensity that isn't present in videos.
This is also the culmination of a really long ass tourney, it is going to have some competitive weight behind it, affecting how people play. In this situation risk taking is not much of an option, IMHO you are most likely going to stick to a safe playstyle rather than trying out things that might work because you have 20 ping instead of 50. I think that results in more boring looking fights, but the competitors are not playing to look good, but instead to win.
I haven't come up against bks a lot, but from what I know of the game their style is really optimized for playing battle. All the dueling tricks and even just playing defensively isn't going to be as effective as explosive offense. In battle the windows of opportunity for engaging in melee open and close quickly, and if you can control when you kill someone in that space of time alls the better for your team.
I think that a great sword back pedaling technique is probably the strongest melee style in terms of effectiveness. Great sword is way out of proportion to other weapons and kills all the time with 1 hit, has speed, a thrust, and range over most other weapons. Using the range well means back pedaling and keeping people away. Further, as I well know, when I'm chasing someone I make all sorts of mistakes like walking into kicks or just not being prepared when they turn on you and swing (even though I know it is coming at some point).
I think to play that style well takes some practice for sure, and it takes just as much activity to maintain that distance and control as it does to plow forward into the mix.
However, dueling against that style is frustrating and sometimes feels like it unnecessarily extends the length of duels. It could also be said that sometimes the fun of the game is the exchange of blows between people, and when you are constantly chasing someone instead of engaging in a melee fight it can get annoying.
When I run into that style I try chase people down since I tend to make a lot of mistakes chasing people down and find it as good practice to close up a weakness of mine. If I cared about the results though I would most likely just stand still and make them come to me. Then I would probably start back pedaling until they got aggressive enough to forget their game. I know people who backpedal with long weapons want you to be in that state of chasing after them and their entire game is centered around you running after them. In a competition with them the best thing to do is to not play their game, and make them play yours.
I don't really know anything about the whole ring selection thing, but I guess in this case it allowed rhade to pressure leo against the wall. Though again since leo went 4 - 0 (I gather from comments), rhade also had to adapt his play style midway through the fight until he found the trick of not coming at you too aggressively and most likely cutting off your areas of retreats, until he could safely put you into a pressure game he is comfortable with.
I would say for leo, the best coarse of action for you is to stay with your great sword, but now put yourself in situations where you can not back pedal and control distance. Fight in small rooms, the arena, or just when you are out in the open, stay close to someone. Perhaps try to learn your keep away range game without needing the whole arena, learn to stay JUST out of range rather than comfortably out of range when they are chasing you.
I say this to you since I've felt that you in particular have been on a quest to be a great player, and have achieved much in that regard, but it seems your pride is limiting your growth. Put the style down a moment, try a new one to fill in the gaps in your old one, then fold in what you have learned back into your old style, hopefully coming out with something stronger and more robust in the end.
When we compete, it is really about how we pick ourselves up off the floor and continue to grow, and I think when you start to understand that, you'll see that being a tenacious competitor is something a great many people admire.