basically anything new inno comes up with, ruins the game a bit more. to be more specific: server ending, world wonders, new gold spending features such as construction and unit time queue cut in half and events specially grepolympics where once again, gold spenders gain tons of advantages because they spend gold anyway so why not make it more useful for both them and innogames
my first server was delta that i left as soon as xi opened, that was the first server i played from the very beginning to the very end, and the game was more competitive than it is now. simmers were getting demolished by players who actively fought because the farming system was different. it forced you to have units that were collecting resources from those villages that took time and the actual making of units that were collecting them. now you collect resources by a push of a button that is instantaneous making more advantage for a simming player because he can run city festivals at a higher rate that doesn't require units to do so(except for maybe conquering villages, but that doesn't count)
one other reason why servers are getting less popular is because servers get open more often allowing players who think they failed in the server they play, can now join this new server and start everything all over again. this migration of players from one server to the other leaves a huge gap in inactivity in which simmers can gain cities if the alliance that has to eat the inactive doesn't make it in time or has no slots for it
innogames developpers are a group of programmers and businessmen who have to make something new and earn a profit out of it. they are not players who can feel the way we do and even if they were, they wouldn't care about us anyway. human greed on one side destroys human desire to have fun on the other