A Legitimate Rumble QoL Suggestion

Lately, I've been playing Rumble and doing fairly well actually, but I feel that there are some changes that could be made to make him a more open pick to people who don't normally play him.

For starters, his Heat gauge has absolutely no indication on when it is going to decay. No passive indicator, no timer, no visual cues. I believe that there could be at least a timed passive icon to indicate when the Heat gauge will decay or maybe even a circular time "fuse" around Rumble like when Yasuo's dash is used on enemies.

Another QoL change that could be made is allowing the player to more accurately see whether the next ability is going to either going to be Regular, in the Danger Zone, or will Overheat Rumble. I believe this could be done with borders around the ability icons (gray, yellow and red respectively) allowing the player to see at-a-glance without trying to calculate heat or guesstimating.

I think more people might pick him up if it didn't feel like they were shooting themselves in the foot every time they accidentally overheat all the time.