What has changed?

Chemist's mana system has been tweaked along with reduced potion supply.

Engineer gained knockback 1 on its pick, destroy-able turret along with health bar, cake nerf, and nerfed teleporters. Turret also can be broken while standing directly next to it again and deals no knockback.

Necro gained knockback 1 on its pick. Still useless atm. Now uses spiders instead of blazes. (I'm not 100% sure if blazes are still a thing but I assume not, I haven't seen them at all). Mobs nerfed into oblivion.

Elf class addition. Buffed to Prot II chestplate and boots. 16 arrows. Nerfed earth element and wind element by consuming x2 arrows.

Medic's sword nerfed by removing sharpness I. Webs can now be broken instantly by teammates and can be broken at normal speed by enemy team.

Archer's punch II was nerfed to punch I.

Pyro was reworked. Uses new frenzy ability when xp bar is filled up by hitting players (About 4 hits). Deals true damage to people on fire. Frenzy does 8 hearts of true damage when hit by the axe I believe? (Don't quote me on this, I don't play pyro often). Added flint&steel cooldown and now has 25 arrows.

Soldier has a rechargeable wallclimb. Only really takes effect when you try to wallspam.

Mage's damage spell range has been decreased slightly.

Ninja's flash bombs now apply a blindness effect shortly when the bomb hits the player directly.

Dwarf now has a level cap of 10. Potion/Fire/Headshot immunity are now acquired at level 10.

I believe that's all for the classes. Correct me if I'm wrong of something or left a change out. I just typed this off of memory.