I know that it is not too polite to point out the flaws, but I do not intend to somehow criticize your creations. Instead I write this so that in the future it will be much easier to keep track of all the corrections, just like a modeler for a modeler, because I know how painful it may be to repair things over and over, and also because the pack is too awesome to let it stay unfinished
Lumbermill: Stand anim - the saw is spinning, should be?
Aviary: Stand Work anim - you might want to have the blue glow always face the camera, I mean billboarded bones?
Barracks: Stand Work anim - the doors get completely slammed

but a new door appears behind them instead

House: just wanted to say it looks perfect!

Shipyard: Stand Work anim - should the glow rotate too?
Altar: the glow has a strange wrap

Tower: I guess you know about the particle issues, just wanted to say that the team color stripe changes its colors or material type

Townhall: isn't the bell moving too fast? By the way, it might be a very little thing but the shutters on the windows of the tower (the 2nd tier and 3rd) are not simmetric and that's why some of them look like doors.
My stupid and insolent ideas:
Eggs in hay in the small birdhouses may also support the idea of the Aviary, Blizz know a lot about their own Aviary

Maybe make the anchors bigger (since they play a role of an identification mark for the race) and give them another texture, like something rusty, or from more shiny metal to let it be more noticable over the grey walls

They can also be put on the facades of the other buildings as there's enough suitable space for it, just like spicing up your dish, good idea?