Point is the inner would be a serious bitch to kill, pumping lethal stuff, like the nexus inners, when there was no one able to defend (ghosts count). But if there are defenders, the defenders are supposed to defend, and the inner does not pump out big damage, just tactical skills to help defenders. And ofcourse mid levels do not have a cake walk, since they will be facing defenders, or optionally beefcake inner. And it would be harder for mid levels (since they do not pump out the same damage as heros) but still feasible given more time.

I admit these changes are not entirely geared for making raiding better for lowbies, but also to make rading cooler in general.