People are already talking about this project as an ai slop version of dragon sweeper. Maybe consider that an inconsistent art style with free packs is still better for reputational reasons. and maybe later on you can either make your own art or find/afford someone who can.
Lemme put it in practical terms: if you want that ideal scenario of someone making art for you, you'll have a tougher time finding someone when you're known to use AI art instead of free placeholder assets given its impopularity among artists.
Anyway, that's all from me, I'm sure you'll figure out what standards you want to be known for, whatever they may be.