Crystals are cool, but with things like Vitality, Djinn, Reload and sometimes Shock Absorb, people don't really have any variety. Its a shame, because some are just defunct. Here's a few proposed changes and why they should be a thing:

Dimension Crystal - Everyone spawns with 3 or 4 magazines of ammo, potentially 100+, which just makes this crystal pointless. A proposed change:
50% chance to add a spent bullet back to your RESERVES.

Blaze Crystal - While it has its uses, there are so many suffixes and better crystals in the game there's almost no point to using this. People may argue that its good vs phoenix or etc, but the only times I use it is on Dragon Rounds. While its a strong crystal, its so selective in its use that using it is...pointless. A change:
Lowers Explosive/Fire damage by 65%, and heals you for 25% of the damage taken.

Jump Crystal/Gravity Crystal/Fall Damage - These crystals do have a use, but they're not really USEFUL. They could be different. Instead, why not combine them into one crystal? The effects are minimal enough. I.E: You'd jump higher, have slightly less gravity and take decently less fall damage. This could be useful combined with a number of things.

Now, POSSIBLY an ENTIRELY different idea is that these crystals are put into a new category, temporary name "shit" or something. They can be used in COMBINATION with the Crystal Synergizer and the obviously better crystals. So, yes. Possibly 3 crystals at once is what I'm proposing, but the third can only ever be one of the more "mediocre" crystals. (If this was implemented, then don't combine the jump/gravity/fall damage crystals of course).

Bit of an odd request that some might disagree with, but ever since it was changed that everyone spawns with full reserve ammo, the "scavenge" part of TTT went out the window, also completely ruining the purpose of the Dimension Crystal. Ammo management is a major part of TTT, and without it, it removes a lot of tactical decision making.

The ball on the bloodsurge's teleport isnt that accurate on the location it teleports you to, so I suggest that it gives a short duration of fall protection, that way using the guns ability wont often end in death by fall damage

Also, you have to put in the exact amount of resources to craft a key, which is annoying. It'd be easier if you could just put in a stack of Fragments and Scrap, and then add the catalysts.
Crafted like 50 T5 keys and it was a pain to do. 70 scrap, 13 legendary fragments, 4 legendary catalysts over and over again...

Make it so after you craft meteor sword you get a tag called "Meteor Sword Crafter" or something. And if you have this tag, the cooldown is gone.

I understand there are other guns that have cd when crafting, but your actually hyped to use those after the first time.

Can we bring back Barricades? They were fun to use.

I've hit people with thrown knives and while it says something like "Terran [traitor] has damaged hockeyfn [innocent] for 100 HP with a knife.", they don't die and the knife just bounces off.
If needed I can provide video evidence.