Actually most important reason of Khuzait snowballing is not speed bonus of Khuzait its because Khuzait has higher cavalry ratio (because their troop tree is full of cavalry units) so Khuzait parties already faster than others (100% cav ratio brings 40% speed advantage, 50% cav ratio brings 20% and so on) Speed bonus was something minor compared to speed advantage they get from high cavalry ratio. And this is still in game.If they were going to just get rid of Khuzait speed bonus why did they have Mexico spend months fixing snowballing?
I'm really interested in seeing if they're going to have to revert snowballing changes now that they got rid of super speed for Khuzait.
In addition snowballing problem was not only related to Khuzaits. It was a problem caused by result of too many different problems. Before version 1.4s some factions were always getting powerfull year by year while some was opposite. There were no ups and downs for a particular faction. A faction was always growing or losing more lands. This is changed after fixes.
Anyway all work done there was needed so nothing lost with change of culture bonuses.