I was looking forward to this game when I saw it. It looks nice visually. There are some things I have to wonder if they were really done without plugins. Not to say that they can't be, but it is definitely harder without plugins.
I think most of the issues I found have already been addressed, such as the one gate, the repeated events (for example, if you leave the boss room to the camp, then return).
I did my run with a party of only Crawks (it was a request, even if it was a joking one).
If you use the route finder item, it marks it for all maps, not just the current one. That was a bit unexpected to me. Nice, but unexpected.
Certain skills, such as the double damage skill, seem relatively useless/unreliable. Might need some minor rebalancing, might not. Still something to look at.
You might want to consider in a 'send to base' type option so the players can swap their monsters at a tent or something. That way players can switch out if they want to keep using a monster, but need another for some map purpose.