2. Instead of gigantic Araquanids spawning from the Spider spawners, maybe Dewpiders or at least some smaller mons. Or at least limit the size of the Araquanids, because they're like, completely massive.
3. A configurable Better Spawner that allows for changing of mobs into Pokemon. Like, I'd love to be able to choose what mons come out of Skeleton spawners instead of a swarm of Cubone or a swarm of random trainers (which sometimes becomes Guzma in Archie's skin) from Pillager spawners. Or the aformentioned Araquanid swarms.
3a. It could be something like a BadMobs configuration that can basically allow you to change modded mobs into certain Pokemon (in the case of modded mob spawners).
Sorry if stuff like this is already in-game, but I can't quite find ways to change all this.