Some new perks as: Expert Pyromaniac - as near the end flamer is useless....
How about some special perks per faction you choose to join...like B.O.S. or raiders...you gain some B.O.S. training or raider training...granting you a little extra in skills or similar...
Hope seeing some traits and perks from Fallout Tactics:
Kamikaze (gain 25% damage)...
Drunken Master...
Leader...
Loner...
Its better to live 3 days as a Lion, then spend the rest of your life as a hyena!