Blast Cone is still an unnecessary RNG element that makes a lot of games feel bad.
I'll start off by saying I love the healing plant and the sight plant is okay, we should definitely keep those. However, the blast cone is really too much. In pretty much 90% of my games there is some sort of blast cone play that ends up saving or killing someone that should have otherwise not survived or not died. In my recent game we caught Trundle out and chain CCd him multiple times. Each time he got lucky enough to be walking towards a blast cone. Twice he blasted himself over a wall and he survived. This was super early in the game too, it could have been a game-changing kill.
Point is they just feel bad. Whether you're the one abusing them or the enemy is abusing them, they don't feel like they give a means to outplay they feel like luck.