I understand that most playing with one faction wants EXACTLY what the other faction has... They think this will bring balance and fair matches to the game.
Lord Vader at Level 10 can be unfair for many, AT-ACT at level 10 can be unfair for many. But as Rebel, I rarely use heroes. If I am going to use, is Kessen for War attacks if I feel I can destroy the SC, and I am sucessful most of the time playing only with him. If the SC can't be hit, then I deploy Luke to lure SC troops while other troops kill the enemies, and if Luke dies at first turret, I don't care because he already did his job.
If I am looting in PvP on Greens, it's Leia for the extra troops support, and if I am attacking in PvP in any other planet is Chewie + Falcon for the extra air support and his increase health. Han gone stupid after the downgrade to some kinda Elite Vanguard and the way he ignores the last building to go for a hidden trap in an opposite corner.
I say Han is now the most useless hero even with Captain Solo buff together with R2 & 3P0 buff. And playing with both, I can say Chewie + Falcon is far better than Imperial Naval Officer.
If you want to improve your heroes, you need to play Events/Conflicts/Objectives to get frags for their skins or buy Crates in Shop. No other option is available.
I agree we need a skin for Luke -- maybe if he deploys a dozen of padawans holding lightsabers would be great as a new skin, but I'm not seeing this hapenning because Devs are trying to clean the dirt with GR and Rodians yet... And we have to play with what we have...
The problem is Devs won't release more reg units or reg heroes in the game. All new units and this includes any new Hero will be upgraded through data frags system. But there's always the "amazing" SD-K4 and the "awesome" eAT-TE -- if you get them upgraded to some usefull level some day...