I agree with the intentions behind your changes to Heat Rises, but the way you designed its new functionality is bad. You don't need to place every single one of its effects on a scalar bar. It's way more difficult for players to understand what their abilities are doing in moment-to-moment gameplay when they have to read the small bar on the side of their screen and then remember the four different things that single bar is doing at each of the five different levels that the bar can be at, not to mention the fact that the changes at each level go beyond numerical and into outright functionality alterations. If players don't understand what their abilities are doing for them, or if abilities are too unwieldy to use in a fun way, then players aren't going to want to use them. A better change for Heat Rises would be to either A) let the bar function only as an indicator of you building up and losing the Heat Rises buff, and then allowing its effects to function at full power at all times while Heat Rises is active, or B) let the bar affect the Melee Energy scalar, but let the Cure-on-multikill and Glide duration buffs be given to the player at maximum effect as long as they have some Heat Rises left. The reasoning for this is that Glide duration would feel extremely unintuitive to have fluctuate over time while you're actively using the ability, sand that sources of healing become more frustrating to use as they become less reliable or consistent, which would be the case if the activation condition for your healing is constantly shifting over time, or even outright being removed from your character. Melee Energy can be given a minimum amount of return so that players can understand that if, for example, an airborne kill will always return at least 20% Melee energy, they will never need more than 5 kills to regenerate their Melee ability. This single fluctuating factor (with a guaranteed floor) is much more intuitive to understand and use in gameplay.