Ok so, i've been playing through this mod a bit and so far, i'm kinda disappointed. Here's the things i don't like so far:
Boars are extremely annoying, and you take damage from touching them even when they're not hostile
The Antlion Queen requires Queen Bee to be killed before you can summon it, but it doesn't say that anywhere in the mod, and the mechanic isn't great anyway, as the vast majority of bosses in terraria can be summoned as long as you have the summon item. Also, the fight itself is way too hard, with it summoning a sandstorm to hinder your movement, spawning antlions, Antlion chargers, and Antlion swarmers, spewing sand everywhere, flinging you up into the air with tornadoes that do way too much damage, and stunlocking you like skeletron's head spin. The music's cool though, so i'll give it that.
Also, where do you find forest guardians? I've been looking all over and they aren't spawning.
Rune elementals are a huge pain, as they can fly through walls, have homing attacks that also go through walls and can't be blocked by weapons, and like to sit in blocks so you can't hit them. Additionally, the fact that their projectiles stay for a moment after they die is really annoying. Maybe make them only spawn after you've defeated a boss.
Wrath eye and wrath zombies are just annoying.
Sorry for all the criticism, but i think this mod needs a bit of polishing.