I dont know why u want to change grendes models.They look cool as they are now.
Well, the current models are for impact grenades. It doesn't really make sense for them to be timed. It would be kind of like using the autococker model for the pgp.
BTW i'm STILL getting eliminated by paint grenades LONG after they explode...like unrealistically long.
Yeah, Picasso doesn't have shell access to the servers anymore, so he can't upload the new version that fixes this.
To answer your questions:
1) Yes, unless it leads to super cheap tactics, in which case it may need to be tweaked.
2) No.
3) If the grenade hits you, it will explode, like the old ones do.
4) No.
5) No.
At least, that's how it will be to start out.
It looks like most people are in favor of this idea, so I'd better get to work.