After reaching level 18 and about 32 hours of play I can, from my experience, say "leave your grenades at your base". The keybinding of grenade with bash/power is very annoying. However, what makes using grenades so frustrating is this:

Player has one or more grenade types marked as favorite, e.g., #8 for frag grenades and #9 for molotovs.

Player decides to throw a grenade and enters the appropriate number on the keyboard.

The grenade symbol should appear on the right side of the screen above the other weapon information. BUT the symbol only appears about 20% of the time. Player has no idea whether they have a grenade equipped because the symbol may not appear and even if it does appear it often disappears if you don't throw it immediately.

I want the "grenade is equipped" symbol to appear without a time delay. I want it to appear 100% of the time. I want it to remain on screen until that grenade is thrown or unequipped.

I want to throw a grenade easily, like a default of G key, or better yet let us assign ANY key to the grenade. Throwing a grenade should be much easier - select a grenade and throw it with a mouse click.