Does Jayce need Buffs?

I used to love playing Jayce, but right now I honestly don't feel that he is strong early, mid, or even late game anymore. I used to play Jayce in the toplane, and if I tried to play him top against any decent top laner I feel that I would be outclassed in lane, and in teamfights.

I'm not sure what Buffs Jayce really needs, but he just seems weak and unable to do anything really meaningful in teamfights. The only way I see Jayce built right now is with full damage items. This makes his ranged form deal a lot of damage, however his low range and long cooldown on acceleration gate makes his poke not very threatening. The amount of champions whom can dive in the game, and are popular right now makes Jayce pitiful as well, and he tends to die very quickly because of building full damage items.

I personally think Jayce's ranged abilities and attack range are fine and balanced, perhaps a lower cooldown on acceleration gate would be nice.

The issue at hand is that Jayce is both a melee and ranged champion, and builds mostly damage. This fact makes his melee stance in teamfights extremely unhelpful and leads to Jayce going into melee form and Q'ing towards an enemy champion and basically getting stunned by enemy CC and dying.

I would like to see more emphasis placed upon Jayce's melee kit. I think this will change Jayce's role from being a ranged damage dealer, into more of a mobile bruiser with a focus on Damage rather than CC. Some of the changes I would like to see are as followed:

A change of build suggestion: Trinity Force, Ionian Boots, Frozen Heart, Banshees Viel, Black Cleaver, Situational

Ranged Stance: Lower cooldown on Acceleration Gate Melee Stance: Higher AD ratios on Q and E, or adding the flat damage back onto Jayce's E. A personally choice I would like would be to increase the range of Jayce's Q "To the Skies" and make it a skill shot similar to Gnars Hop.

Thanks for reading! I know suggestions are not always taken seriously, but Jayce is just weak right now, and really needs some tweaking to become viable in this meta, I rarely see Jayce do well now.