About the multiplayer balancing:
In general, I like the changes. One thing worries me however. It appears that cav is indirectly buffed even further while cav is already dominant in every gamemode except for captain.
Arguably the two major counters to cav, throwing spears and arrows are nerfed drastically. Throwing spears are not able to be picked up from corpses and taking them no longer gives javelins as well, and pierce damage against horses is lowered. This only leaves spears and pikes to counter cav. Pikes are buffed a little bit sure, but they still suffer from glancing if the horse is too close (which makes no sense for obvious reasons). Spears are just poor counters to cav because they suffer from glancing, often dealing low damage to a cav from the front letting the cav move on. Infantry spears are also shorter than the lances or long spears that cav have, so stabbing a rider is unrealistic and just results in the inf being stabbed, and likely killed, instead. Furthermore, if a stab on a horse head is done successfully, the stab does about 50-90 damage which is by far not enough to dismount, and only yields a single stab on the staggered rider for 20-40 damage. In melee fights, it's even worse. Either the infantry holds a spear and gets killed in the melee, or the inf holds a sword/mace/axe against the enemy infantry and gets killed by cav.
Cav is already op with couches that always instakill, the ability to ride away relatively unscathed after being staggered, doing major damage without real opposition (except for other cav), bump stabbing/slashing which is unblockable, being able to knock down non-cav by riding into them.
I would like a response from the devs, because this will most likely further destroy the balance of the game.
In conclusion, cav was already dominant in every gamemode other than captain and will likely be even more so in 1.6.1 unless spear damage against cav is heavily increased or cav damage, couches and bumping is nerfed significantly. Alternatively, cav cost could be increased significantly. I know this was hinted at for TDM and siege, but skirmish would need this as well.