Alternative Blast Cone

As I understand Blast Cone supposed to be strategic point that affects terrain traversing. As a side effect it has binary impact on champion interactions - being a random disengage tool (e.g. chase a low health enemy: if there is a blast cone - you win, if not - you loose).

Alternative. Blast cone attaches to terrain (grows on walls). When hit - it explodes and destroys a small part of terrain for a short period of time. Then terrain restores. Blast cones grow on strategic locations. As is currently: Baron/Dragon wall, bot/top brush wall, buff/camp walls. Gap is relatively small. No monster or big pet can fit in it (or stacked Zac/Cho'Gath) but normal sized champions can. Enemy team cannot see/hear explosion and gap if they don't have vision of the area. Gap stays for 5 seconds and then recovers with magical visual effect. Units caught inside gap at the end of duration are pushed outside to the closest edge.

There are drawbacks though. Being a disengage tool isn't that bad. It somewhat allows for strategic planning. Currently single Blast Cone gives multiple options (e.g. blue buff blast cone) which seems more interesting.