See, the thing is, I liked these things because they make the game feel more visceral. I always enjoyed maps like stalemate, because it was often hard to push through the defenses, but when everyone worked together and managed to win the game, it was a great feeling, every single time.
But I suppose it's really down to personal taste. I just think that a sequel to a game should be at least as good as the previous game, and while RO2 is definitely a good game, some of the things that made RO so enjoyable and atmospheric, have been deviated from, sometimes a bit too much.
The thing is, that even though the defenders might have an advantage in picking off their targets, you can still even out the odds a bit, by for example, allowing less players on the defenders side, allowing more snipers and such for the attackers side, having more or less reinforcements and a faster spawn rate etc.
But, like I said, it's all down to personal taste, and I'm sure modders are already cooking up something nice that fans of the previous games will enjoy.