I could see this change to the grenade explosion being a nice addition of "action packed" opportunities, as long as attention is paid to over lapping AOE if this change involves expanding the AOE.
But, yes: this feature could add a lot to the use and evasion of grenades. I've gotten much better at running from grenades, however it would be great to get the slim chance to just barely survive. Plus it could help clear out a few more in big groups, making the opportunities for a rush much better.
The Flamethrower suggestion: I like this idea to as the other player brought up. I'd like to see it having the obvious issue of exploding if shot from the right angle though. The threat of flame throwers should go both ways, if implemented. Big damage but big threat to allies if hit right plus the limitations of weight and range. However this weapon could/would be more useful if/when you guys implement buildable structures. [ Is there a forum page to discuss field structures? ]
And fire could be nice. Yet as a low end comp gamer (I really wish I could upgrade to something grand, but real life you know...well real life that doesn't involve making games

) I'm just concerned for frame rate issues. Shadows, water and fire/bloom tend to run down the fps for people like me. So I request, on behalf of those such as myself, that you allow for some low level setting. Especially if fire obviously is a threat.
So yes on a chance to get blown out of blast radius if close to the edge.
And yes on fire with the hopes for some low end settings.
Thanks.