I find it incredibly difficult to use in a meaningful way, you either get a direct hit (i mean hit someone while the nade is still moving, usually someone who's chasing you), or if you want to spam an area and hope your enemy walks on your granades, you either know the right spots on a map PERFECTLY since a slighly wrong angle can screw it up completely, or just have to rely on luck.
Also this makes granade jumping nearly impossible, since it's very hard to reach your granede before it detonates
And it's way too easy to hit yourself with a misfired nade that bounces around the map to end up blowing right behind you

On the other hand, i can't imagine a situation where spamming that far could be useful.
I'm not saying to make it very short range like Q3's GL (the electro does an excellent job at that) but slightly more controllable nades would be killer
And, of course, don't touch the primary, it's perfect already

cheers