The brain is largely irrelevant.
I have no idea what they meant, but the explicit use of the word level implies it might exceed the skill level boundaries you mentioned earlier.
The word level is used elsewhere without that implication.
"No robot skill packages may exceed level 3 and robot brains cannot process skills that require more than a brain’s inherent (not expanded) Bandwidth."
RH p73 is pretty uneqviocal.
The stat DMs for INT add to the level but aren’t a level themselves. Again, everyone has to guess since they don’t spell it out and it settles nothing, but I find it interesting.
"The characteristic associated with a skill can provide an additional DM to checks. For simplicity, this DM is included in the final skill determination of the robot as listed in the skills row of its description."
RH p73 is pretty uneqviocal.
It seems wrong that a TL16 robot would be limited to a skill package of 2 where lower TL could have 3. Just saying.
It may just reflect a design preference (or a cost reality). None of the other Self-Aware or Conscious examples that specify their skills have any that would require a even a level 3 package, though that is certainly possible. This particular example is clearly an emulation of a Blade Runner replicant. It may have appeared in an exiting publication and the Skill Level limit a function of that original source.
Of course, this robot doesn’t even have a self-aware brain, but earlier brains aren’t capped at skill package level 2.
Which robot? The Superior Android we were discussing does have a Self-Aware brain.
There is a table with lines for more advanced bodies. I wonder if they would have higher skill package limits.
The Skill Package limit of 3 is not a function of the brain it operates in. It is an absolute limit in package complexity. A TL13 Very Advanced brain could run a level 4 skill package if such a thing existed as it has the necessary 4 bandwidth to accommodate it. Skill-4 packages just don't exist.
The challenge of tasks is not supposed to be managed by DMs it is supposed to be managed by setting a Difficulty. It is those difficulties that differentiate the increasing capability of the higher brains, not getting +5 on a routine task.
The ability of brains to attempt more complex tasks is determined by the level of their Expert software. Advanced Brains and above can attempt Difficult tasks. It needs at least Very Advanced Brains to perform Very Difficult tasks. Self-Aware brains can attempt Formidable tasks. A Conscious brain can attempt tasks of any difficulty.
The only way to manage this is by a single shift in difficulty as a result of taking more time (or increasing the difficulty by going faster).
Whilst is is not stated explicitly it follows that Basic brains can only perform Average tasks. Whether Primitive brains are limited to Routine tasks or can also Manage average tasks is unclear.