Here are some ideas that might make him good again:

•He should heal like 75 health form wall and molly but it would take a bit longer.

•Wall should not blind him while standing in it, it should also not damage teammates.

•Molly should do a little more damage and be a bit bigger.

•Ult should last longer and recovery time should be shorter

•ult should also allow him to be able to stop his ult and go back at a click of the ult button again. But I should maybe cost 1 more ult point (Credit for this one to: u/klok101

•Flash should last longer

I started the game as a Phoenix main but now he’s just unplayable and outclassed by Kay/o Neon and viper. I’m not saying that everything here should be added but these are his biggest problems imo.