Hi! I'm also a gamedev and big tactics fan, and so while vore isn't one of my primary kinks (I normally only go for it when it's paired with size difference) I figured I'd give this a shot.

After playing the first map, I can see there's definitely the start of something compelling here. The characters have varied strengths and playstyles, though I found some to be significantly less useful. It mostly just needs a lot of playtesting and balancing. Designing maps with the right balance of difficulty isn't easy! I'm assuming the effectively endless pull of vessels/feeding experience from the gatcha won't be in the final game, and you'll get currency for completing missions.

The best advice I could give you would be to check out Great Ambition of the Slimes: https://store.steampowered.com/app/2171500/Great_Ambition_of_the_SLIMES It's one of my all-time favorites, and happens to be quite similar, with many mechanics you could tweak for this. For example, enemy AI could prioritize attacking foes that have eaten their allies.