@RC Ah, sure. Sorry for near-panicking.
On Assaultsuits: I see no reason why battlesuits should be priced differently based on "skill/stat requirement" and not on resource distribution; the resource distribution was, by design, equal for assaultsuit, so the price should be the same. It's not the "price reduced because stats", it's "price reduced all across the board; oh, and they all have stat reqs".
Now, assaultsuit has the MMI pre-requisite, which is one thing to consider. Another, I believe that Aux requirement should remain or, at most, be reduced - it's not that we're not commanding an immense behemoth of a machine, it's that we're doing so more efficiently now (less lag, more precise control, etc.).
On MMI: Honestly, I think it should be Mind. Exo is too rash and weirdshit (all the amps and xenos tech and all), whereas Aux might suffice, but is still a skill. Using MMI is more of ability, like dexterity and strength (both fit here because it's "dexterity of mind" and "strength of mind" that are to be put to test with MMI) - not a specific skill to do things. It's just the same as operating a computer mouse or a touchpad - it takes some learning, yes, but in the end it's more about the user's response time, manual dexterity and all that rather than some kind of "operating finesse" which is tested to use.
Furthermore, we already know that Mind is used to operate the mechanical addons for robobodies (it's the stat requirement for those) - and MMI uses exactly that sort of interaction as robo-brains do (as evidenced by brain-chatting and all). Thus, and because robobrains probably would not even need the MMI to operate stuff, I do not believe it should be put into any consideration.
On Heavy Robot Body: Seriously, it does not even require MMI. It's just dumbed down lighter variant of a battlesuit. It has to be cheaper, or there is no reason for its use.
(And yes, if it means that it takes +2 Aux to operate a machine of that complexity/size, then so be it. We need cheaper equipment, not one that can be used to circumvent stat reqs. They are there for a reason, as is the general price reduction across the board. )