I think everyone can agree that dying to mines as infantry is frustrating, especially for newer players. For me personally, the frustration comes mainly when I die from somebody else stepping on them and from those people who run into a rax to drop mines and get easy kills. I do like this idea mainly because it would force grenadiers to actively watch over their mines so they can follow up and finish of the people who step on them but it wouldn't fix the other sources of frustration, the bigger explosion radius would just make it more annoying, it's already pretty big. What I would suggest instead is to nerf it to so it does 105 damage to infantry(So you live if you have health upgrade) and nerf the explosion radius instead to a point where only the guy who steps on it will die to it. That way it's still just as good against tanks but it would reduce the frustration to infantry.