It 's like you're trying really hard to find arguments that make your request valid.
Maybe lay back a bit, then come back here and reread everything?
Even if they would hook up an keyboard - they would still have only 5 skills they can access at once,
and they'll still have to press a button to switch them no matter how many keys they have.
It 's rather the other way around - console players will most probably have no way to use any addons after all.
Did you write them an ticket asking if it would be ok for them or not?