Intense Flames is useless. Not just from a balance perspective, but also for roleplaying.
The threshold is too low. Triggering it is just plain unlikely, and is mostly redundant.
See http://www.uesp.net/wiki/Skyrim:Intense_Flames#Fire.

I would like to see the perk changed somehow. I don't know precisely how. I'm not a game designer. Maybe just raise the health percentage necessary to trigger it. Maybe change it to something new altogether.

I would resort to mods to do this, but all the mods that change the perk also affect the other elemental perks, which I am more or less satisfied with.

So please, Bethesda, in your next patch, fix Intense Flames. I doubt it would take much time, anyways. Thank you.

Oh, I thought you were reporting some kind of Bug here.

But what you meant to say was "So please, Bethesda, in your next patch, read my mind and change Intense Flames to something different, that I might like a bit more".

A fair few people really need to get their heads around the concept that in order to 'Fix' something it actually has to be broken in a fashion where it deviates from the stated design.

Just because you don't like the way something is designed doesn't mean it's broken.

If you don't like the perk just don't use it.

Yeah... If it isnt broken it doesn't need fixing... As for other perks on the other hand, now THOSE need to be fixed, yet they still have not been since release.

First World Problem. "I can't seem to find use for Intense Flames because I keep killing my enemies too quickly!"

Intense Flames is great fun if you can spare the perk. It works on Dwarven Centurions, Draugr Deathlords and Mammoths. To make Fear or Rout spell work on them, you need to invest heavily in Illusion.