Yep, spies (and other agents) seem to be a bit better at assassination this time around.

I can attest to the "kill general afloat" tactic. Another option, if one is available, is to use an artillery ship to sink their general's transport; pulled that stunt against the Varinians last night, lol.

I understand what you're saying about assault/withdraw...but I don't quite get the underlying mechanic. Do the walls take additional damage merely by going to battle? Or are you talking about damaging the walls with artillery and then withdrawing once ammo is exhausted?