Hey there, currently looking over all the siege maps again:
Devonshire Keep: Could you remove the destroyable building please? Also, a ladder to the keep would be nice, just pushing through the front is rather boring =P (Noone is using the backway is what i'm saying and a deployable ladder would probably change that and spice the map up again)
Himmelsberg: Edit the backdoor to a normal door please. The sally door takes too long to destroy and makes backway not a very good option. And i think you should move a few attackers spawnpoints towards the gate again (Not the initial one, though!). Imo it's still a little too easy too defend, maybe closer spawns will help with that.
Rochester was already fixed i see, nothing to add there.