I guess if we want all the bells and whistles,even with the highest end rigs,we can still get flickering.Like Mark, I can get rid of most of it by setting the ACE to flight deck only.I know that does'nt help you,so maybe this bird needs some some work still on the software.
Whether this is commercialy feasible from CS's  perspective is another story.Maybe a survey is required,with respondents indicating their system specs and whether they have flickering with cabin enabled and not. the specs should also indicate the MB manufacturer
Ron