Well, and that's a good thread!
So, I myself playing as a quite nimble foot soldier with spear, shield, scimitar and a couple of throwables, and doing pretty good honestly! But to do so you need high (90-100 and above) athletics, same or above polearm skill and a lower-than-30.0 equipment weight. As soon as I got used to the combnation, I never lost a single duel with spear against any opponent, mounted or no.
But.
To do so you need proper footwork to dodge certain attacks, keep your distance, punish facehuggers with shield/shaft bashing, aim your strikes carefully (stab them in the face, if too close - stab in the feet, you need a good spear (imperial one is good for starters, menavilon if you ok with short range, fine steel leaf spear for some more lenghth).
When I, on rare occasion, use 1 or 2-handers? "Haha blade go chop chop". And it don't even matter that my weapon skills for such arms are lower, it's just MUCH easier to use effectively.
There is some theoretical arguments against spear buff:
"But spears are strictly anti cav, you shouldn't use it against infantry!" - no. Well, they are to some degree, but not so much. Pikes are. And even then...
I see charging cavalryman. I can:
1) Stab his horse with my spear to stop it, then stap the horseman 2-4 times to kill him, hopng he will not run away or block.
2) Take my javelin and just pick him off his horse in 1 second.
3) Bring mah tuhanda/glaive/voulge/etc and just cleave him in half along with his puny pony, his wife, his son and half of his neighbours because the sheer amount of damage allows me to do so easily.
Which makes spears, well, not so optimal choice for anti-cavalry warfare.
"But spears are all about range, no wonder you should keep it," - and with that I totally agree! But. We have bows, crossbows, javelins and other ranged weapons with more range, damage, ease of use AND just as useless when someone facehugging you.
So, to use spears effectively we need:
1) Significant buff to stab speed and damage when spear used without shield. It's easier to facehug then prevent such actions against you, so why the latter should be less rewarding? Besides, it will compensate lack of shield, because current increases for 2h grip certainly fail this task.
2) Keep our distance, and more means to do so. Like those push back perks, but NOT locked behind a TONS of grindy grind.
3) Ability to adjust the grip on a spear when pressing X using it two-handed, for even faster stabs, but with much shorter range.
"Peasant please, spears are fine, just get a horse," - but I don't want to. There is cavalry spears (or lances) and there is infantry spears. I want to use the latter as it is supposed to be used. And was used with great effect.
So this is what I think on the matter. More of a rant than an actual post maybe, and I talk only about SP spears (I heard they are/was pretty OP in MP due to some exploit or something), but still.