my post from an older suggestion:

end game content:

tc reward for belt:

the smallest booster starts at 50 tc per win,so the max you could get
if you are a custom belt should be less than 50 tc,something like:

White - Black 10 TC
2nd 20 TC
3rd 20 TC
4th 20 TC
5th 20 TC
6th 20 TC
7th 20 TC
8th 20 TC
9th 20 TC
10th 30 TC
Master 40 TC
Custom 45 TC

its a small upgrade,the amount is still insignificant,it will have too
little impact in the inflation and at least its something of a reward
for getting a higher belt.

a calculation to show how much it would add in tc circulation:

u made 20000 toricredits if you won 2000 games in official servers from white to black for 10 tc per win,
160000 if you won 8000 games in official servers from black to 10th for 20 tc per win,
150000 if you won 5000 games in official servers from 10th to master for 30 tc per win
200000 if you won 5000 games in official servers from master to custom for 40 tc per win.

and lastly,by having that happen only in official servers,it would be easy
to find anyone exploiting it by alts.

challenges:
hearthstone style of 3 daily random challenges,you can reset only one of them,small rewards,
depending on the challenge,it could help increase the popularity of weirder mods,brings some fun.

tutorial:
a good tutorial would be making the new players understand the correlation of
moving joints,frames and ghost,how the ghost shows what is going
to happen depending on your joints setup and how that is depended on the frames
(longer frame rounds=less complicated moves,shorter frame rounds= more complicated moves)
and how this changes depending on the mod setup. (gravity,distance,threshold etc )