How would it benefit the server
At the moment, it feels cheaty when you kill a traitor and you immediately get 10 points for it. It's a quick way to find out if the person you shot is a traitor, and you don't have to check the body to be sure, so I suggest you get the points after the round has ended instead of during the round. This will prevent people from easily knowing if the guy they shot is a Traitor without people checking the body or leaving their spot.

Potential Issues/Exploits
None

Additional notes
Doesn't matter if you do it with the Traitor, for obvious reasons.

How would it benefit the server
By giving more options for Traitors, you give them (and innocents) more playstyles to play with. Weapons like the Silent TMP, Radio Jammers and Tripwire Mines are a few cool weapons to add. Ofcourse, more can be added (or suggested!) if people feel like just those aren't enough.

Potential Issues/Exploits
Only issues I can think of is some with weapon exploits. Therefor the weapons should be tested before added to the actual server.

Additional notes
If you know more custom weapons, link 'em down below!

How would it benefit the server
Currently the pre-round time is set on 10 seconds. This simply isn't enough time for every person to find a weapon or get a good start.

Potential Issues/Exploits:
None

Additional notes:
I suggest around 15-20 seconds. Too much time and people will get bored during the setup.

[How would it benefit the server
Having special rounds varies the game up a bit. Most people get bored easily when playing the same thing over and over again, and let's be honest, TTT stays around the same every round. Traitors running around, gunning people down. Innocents and Detectives tracking these people down, and ofcourse that one RDM that every round seems to have.

Potential Issues/Exploits
None

Additional notes:
A few special round suggestions could be, for example, a round where every gets a knife and can only use a knife. The players will be split into different teams (Traitors and Detectives), and try to take others down. A big text will also indicate that it's a special round.

How would it benefit the server
Knives are underused currently, and for a good reason. Since the knife only does 50 damage at the moment, people will know when they get knifed and call the Traitor out. The Traitor simply doesn't have enough time to kill the Innocents before they turn around and shoot at them, or call them out. The only times they will actually manage to pull this off is if the person doesn't notice (which in most cases they do), or if the person has no microphone or radio binds that calls the Traitor out.

Potential Issues/Exploits
None

Additional notes
You can only buy 1 knife, and if it can't give you reliable kills, it won't be used all that often. The 2-hit kill also destroys the knife's purpose of being a sneaky weapon, for reasons stated above. If this can't be added, I suggest making a throwing knife do a 1-hit kill, or let the knife do 99 damage (instead of 100 = insta-kill) instead.