Okay, just an idea, but I was thinking and this is what I came up with.
Rolling atrox for the sake of +1500 aao is stupid, I think an aao boost should be open to all breeds. But, as it stands, 1500 aao is over powered. So.. heres a small idea..
Make a new general perk line that uses SL perks, NOT ai perks. Make it between 8 and 10 perks total. The new perk line includes a "new" mongo rage that is +800 AAO for 15 seconds, no drawback (debatable? maybe small drawback of sorts..).
The new perk line is open to anyone who wants to use it, but every profession has to make a huge sacrifice in order to get it. Sacrificing SL perks affects everyone massively so the people who get the new MR are going to have a severe trade off somewhere. It's also less over powered than the current 1500+ aao MR, and this now opens up the ability for trox breed perks to get some adjustments that are better deserved than a joke HoT or AC buff.
Thoughts?
Keep in mind this is meant as a nerf to MR and those who rely on MR. It's designed to make access to MR require sacrifice, which makes it less OP by far, and opening it to everyone allows for equal opportunity to perk it and circumvent evade professions should they desire to go that route.