While I'm primarily a Trunks user, Trunks doesn't need much beefing or nerfing. He's supposedly fine as is.
However, Gohan is another issue. He has the same speed as Goku and Vegeta, has a beam absorbing shield that blocks melee users and beams (and doesn't use ki in SSJ form) and receives one of the most decent weapons in ESF : The Kamehameha.
Now everyone will say big deal if Gohan gets KHH?
It will be when he transforms first and begins blasting everyone into gibs with KHH.
Sadly the only cure for this is to either survive the blast or use Gohan as well. Or kill the Gohan user and transkill him (something which I approve of, that's how the game is played!)