He definitely does need a nerf again. He gets a free pass with tear because of how massive his numbers are. If you grab tear early, there's supposed to be a trade-off. Jayce doesn't have to deal with that because of how much damage and overall utility is jam-packed into his kit. He still has insanely good harass and all-in potential without opting into damage early.
He's a high poke champ, yet he still has pretty damn good utility an great all-in/bruiser capabilities with damage builds. Its like Nidalee when her damage builds were broken because her R still granted bonus resistances.
At least her armor/MR shred was actually difficult to apply to someone and she had no way to force someone to disengage.
If you don't think Jayce needs a nerf, you've got some logic issues. He's in the same boat as the original Nidalee, who had tons of stuff nerfed for doing exactly the same thing as what Jayce has. Except Jayce has more.
If they remove the bonuses he gets from transforming (reducing your armor/mr by 25%), excluding his passive, he'd be a lot more bearable without feeling gutted.