I think the main thing is you wont make everyone happy. Ever. So find a middle ground, and that only comes by adjusting, nerfing, buffing etc. I think the devs are doing the right thing.
I understand its frustrating and sieges will be longer, but a siege shouldn't be 15 secs or less. Especially with the larger npc towns. I understand the frustration with some of the older players having make changes. But if everything is super easy, what's the point in playing a strategy game?