If I throw a grenade far away it should at least land somewhere near to where I threw it, even if it goes way off course.
The worse thing in any game that has a throwing mechanic is when your guy fumbles terrible and tosses the grenade at his feet somehow.
I can accept people being terrible throws under pressure (I'm sure someone will post a video of someone accidently tossing a grenade, live or otherwise, too close to themselves) but in theory our soldiers are some of the ""best"" soldiers on Earth and they should have a good enough throwing arm.
If I toss a grenade 8 tiles away, assuming my character has the strength to make that throw, the grenade should land somewhere near to that throw, even if it deviates three or so tiles to the side away from it, the only circumstance where a grenade should end up landing very close to the thrower is if the person throwing is doing so when there's some object in their way that could catch the grenade, a person, tank or object.