I mean it is a good game, afterall

If you want to try something a bit different/slightly more challenging, you can try and playthrough never using Jupiri and/or Pukis(at least as soon as you get 4 other monsters, so you can just have them sit in the backline all the time. Jupiri in particular is kind of OP, and even Pukis is a lot stronger than most, if not all other monsters you get. It is fine to use Pukis transfer and such ofc, that doesn't affect battle anyway, and is more of a QoL if anything. (I done such a playthrough once myself)