Because of the nature of higher-level play, a ~10-15% increase in damage, IMHO, works out to be much less in practice. Additional, (and please correct m e if I'm wrong), but I think that bonus only applies to the base damage of powers, not taking into account enhancements or other buffs. To that end, and seeing how it can't accept anything besides end redux or recharge, I'd like to see it get some buffs:
1. It kind of makes sense that directing your team to attack "harder" might make them resistant to slow or immobilize effects.
2. Perhaps pushing full on offense might offer a little damage resistance or absorb to your team, as they work through minor injuries.
3. Perhaps driving your team to focus on attack might make them more able to bypass an enemy's defenses, (defense debuff applied to enemies in range).
4. Similar to the above, it could impart a minor damage resistance debuff to said enemies.
5. Finally, being driven to attack might make your team less apt to be blinded or knocked aside, (minor perception debuff resistance and/or some degree of knockback resistance or protection).
I'm not saying Assault should get all of these buffs, but I think it should get one or maybe even a few. Your thoughts? Thanks for reading!