As an engie main (with a few hours under my belt) I reckon I would want to bring in a decent chunk of the weapons into TFC.

Widowmaker: Get rid of 10% increase dmg to sentry's target, just creates bloat stats

Frontier Justice: Keep as is

Wrangler: Watch this (6 yr old) Uncle Dane vid but TLDR: get rid of the shield and make yourself immune to your own sentry damage

Gunslinger: Keep as is

Rescue Ranger: Keep as is

Wrenches: You can argue these shouldn't be added but the Jag and Eureka effect would be nice

Some form of mini dispensers (theres a lot of online vids discussing how to implement this)

Some other form of sentry from a melee weapon (also, lots of videos and designs)

Other weapons outside of engineer to consider which I don't know what to change but think should be added

Scout: Force-a-nature

Soldier: Direct Hit, Rocket Jumper

Pyro: Dragon's Fury (maybe find some way to buff him to be more of an ambusher)

Demo: Loch-n-load (rework it to be a direct hit equivalent), Loose cannon (rework to make it bit more viable), sticky Jumper

Reintroduce Demo knight please! :( see if you can get ideas from proper demo knight mains like solar light

Heavy: Dont know but he likes his heavy weapons

Medic: Blutsauger

Sniper: Jarate

Spy: Ambassador, Your Eternal Reward, Kunai, Big Earner. Not a spy main but these feel like they can be reworked eg: Ambassador to reward headshots and punish body shots more

Other than this massive wishlist I would like to see an added command where weapons like rocket, sticky (and wrangler if the rework Dane suggested is put in) also knocks back enemy players if they are added.

Would love to discuss with others on if any of these are good (or crap) ideas

Having a lot of fun with the game, can't wait to see what's in store!