Well, I've played the most recent update of this mod and here's a couple of things I've noticed:
First of all, when doing a summoner playthrough I've acquired an Imp Staff. The staff's summons set enemies on fire, mine did somewhere about 37 damage over time. What I've noticed is that all enemies that can be set on fire get their health reduced to the exact amount of damage the on fire debuff is doing, yet it still doesn't kill them, they just get stuck at 37 health and all I gotta do is hit them once to finish them off. In my opinion that's pretty overpowered.
Second thing, enemy monster level scaling is kinda nuts. I've decided to play this version of the mod as my old lvl 1800+ Ranger and summoned the pumpkin moon. At first the enemy stats were fair, I could damage them and they could damage me, but then the Pumpking dropped in. Naturally I immediately started shooting him but I've noticed that I'm constantly doing 2 damage per shot. Not only that, when I inspected his stats I simply nope'd the hell out of there, closed the game, GG no re.
And for the last I've noticed that dropping the guide voodoo doll into the lava does not necessarily kill the Guide instantly. I could summon the Wall of Flesh 3 seperate times with the same Guide, which was kinda helpful actually.
I guess that's all I got for now. Maybe I'll play later and report some other things if I find any.