Please add a way to get at least 2 type of grenades, this will help make better pushes and adds more diversity in the playstyle. Example: Impact + Flash can be a very good combo, Frag + Smoke can be a very useful defensive utility, Etc.
The belts can modify how many grenades you could charge.
Like:
Everyone else
1 primary + 1 secondary
2 primary
1 primary + 2 secondary
2 primary + 1 secondary
3 primary
Support
2 primary + 2 secondary
3 primary + 1 secondary
1 primary + 3 secondary
4 primary