Really enjoy the commitment to the theme, and nice to have a big crafter thrown in! All of it comes together really nicely, and what lovely duck monuments! ♥ Really fun that there's a perminance to their removal too.
My only thought is that, perhaps, a lot is dependant on the duck depot count. Now I've not played as them, so it could totally not be an issue, but it seems the way to keep this faction weak and struggling is to just smash a few duck depots. Then their action economy is hurt - Less moves, less (potential) battles, less crafting, and worst - less cards! Also, unless I'm confused, it seems you can only build one of those lil' depots a turn, so to keep them stagnating at a weak level you just need to make sure you destroy one of them. Again, in practice perhaps this isn't how things shake up at all, but just a thought! :P
Love the theme, both aesthetically and mechanically ^^