Anyone else feel like the "survivor" subrole is a little underwhelming?

Compared to the other 2 sub roles it doesn't feel that great in my opinion. Its substantially weaker. 25% overcharge, and 25% of healing gets dealt to yourself.. or you can start passive health regen for a minimum of 0.25 seconds at the cost of your 8 second cooldown.

Like I get the other roles could be problematic for illari, (self healing from pylon at a range, being able to hold on to ult for longer without losing value) it just feels like a really unfair power difference. everyone else in the sub role seems like they make much better use of it. maybe the minimum duration could be extended by a bit?

maybe those with the survivor role could get a slight reduction on the heal reduction passive to themselves? maybe 5%?