Lol another question for u. What if the players terraform the land not adjacent to each other. So every player does not cuz a change at other players location. Would it still cause lag???
lol joe, hey you trying to ask me to my knees hee?
Well, again talking about 'guessing' only that depends on how the transaction mechanism is implemented. Does it 'know' that the changes can be seperated from each other? I guess most things are done easy as long there is no need to do them complicate ("keep it simple, stupid" is one of programmers rules to not loose yourself in featurism :P ). So if they're done easy, that makes no difference, and so the (guessed) answer is: YES lol.
But on the other side: I suppose those Xsyon-team is a hard-core one, and that means: Obviously they do it that way that serves best, and then: NO