Sunfire upgrade

Has riot ever thought about adding a little umphh to the sun fire burn over time. I know they just tuned it up a little bit but it still feels like it's only really strong for wave clear or long tank fights. I was thinking maybe they could add a mechanic that is sort of similar to udyr's third auto in Phoenix stance. Where like every 3 seconds of combat with champions it would add a blast of fire around the champion (with the cape) and does like double the damage (or something along the lines of more meaningful combat damage) so that big tanks that go straight tank can feel like the cape makes some sort of impact in fights