My feedback:
I think it's really beautiful and amazing work, but also not any fun to play (for me atleast) 😦
I went in playing this naively, without trying to game the mechanics, without pausing. I did not finish it, because progression was very slow and drudgery. I felt like Sisyphus.
After having played cw4 too much, placing towers has become tedious. Placing towers without being able to drag drop them, is extra tedious. Automated tower expansion would be a great boon.
All build limit expansion being based on resources, makes it a very slow game mode. It will also require very specific map design to make it work. Fe: you can't just toss this cpack into a farsite map and except it to work properly, because build limit expansion is so contrived. So imo not all build limit expansion should be based on resources.
I think those were the main reasons as to why it wasn't fun for me. You can probably safely ignore my feedback btw, I've always been a very picky player. I don't like popular game modes like fps or vacuum either.
Less critical, more nitpicky things:
I miss double click selecting of nearby units & the info panel information of vanilla units (build status and ammo in particular). I loved that you got drag select in.
It would be a nice touch of the resource gatherer snapped onto a resource if your cursor was close "enough" to a resource without a gatherer in place.
Blue units in blue creeper is a bad color scheme. I've been meddling with classic PAC and changed the dominant color to yellow and that was a game changer for me.