To me the greatest problem with GW is that it's out of place.
I don't know what older players were expecting from it, but the end result is something alien.
When I play a game that I find fun and casual, I can't suddenly go serious even for a small aspect of it.
I've read people saying that they enjoyed 30 minutes fights etc. Good for you of course but was that ever the "purpose" of the game? I'm not one of the developers but I doubt it.
I've read that people enjoy the "challenge" of single colors. Good for you again of course but was that ever (even remotely) the way to play the game? Wasn't it always to use all the colors so you won't handicap yourself? And at the same time leave the opponent free to use whatever he/she likes?
People have said that they enjoy this aspect too, cause it made them "think" what teams to use. In my opinion it's a restriction and restrictions are never good. It's essentially the exact opposite of event weeks which are a good incentive to use different troops and teams. If you didn't use different troops and teams while free to use everything, then you didn't want to use different troops and teams.
The schedule of the whole thing. I can understand that the developers want us to play more often but going from a "play whenever" to play ESPECIALLY on Sunday 30 matches (if you skipped the rest of the week)... again restricting and alien. This shouldn't even have to be this way. There is the SKIP button so we should be able to play the whole 6 days' matches from day 1. If the enemy still hasn't set up his defense teams, then that's hes "bad".
The sense of "obligation" that it adds to the player. Before GW, one (or at least I) would play as much as he wanted. From a lot to not at all. However not playing, in the worst case scenario, would only hurt you, if for example you didn't reach the guild's goals for the week and got kicked. Now you do "hurt" the team, even if you play all 30 matches, with a poor performance. Sure most guilds don't care about it but still do you enjoy being the lowest score contributor?
And that adds to the "shame" feeling that GW adds to the players. Before rankings never meant anything. Now however your performance is suddenly closely watched and for everyone on the guild to see. Just like the kill/death ratio in a fps game. Seeing that on a casual game is out of place and makes you conscious of it.
I could add other issues that I have but the most important one (to me) as I stated, is that GW feels alien to the rest of the GoW game.