You've never played a list or against a list with blockers? It's not fool-proof, but it works.
Also, assuming two Z-95 with BMST, in order for the Aces to "control the first engagement" they will need to NOT PtL right before the Z-95s come into range (which for two ships, range 1-2 is ENORMOUS). The Aces can do this but you know what that means, right? No turled Fel, no target-locked/evaded and focused Inquisitor, etc. etc.
There's another 78 points of list that the Z-95s are setting up to hit the Aces when they're "protecting" themselves from BMST but not turtling up/repositioning.
Again, I don't think it's going to rattle the world, but you're naive if you think Aces will "auto-win" against ships using this strategy...
By the way, no one claimed BMST is auto-win. Ever.
I have played against blockers, and have been able to control my range and engagements and avoid getting blocked. This is easier than you think with ships that can BR and Boost.
I don't PTL my Aces until the first engagement, so my Aces are never in danger of getting BMSTed before the first engagement.
Its not that Palp Aces will auto win against lists with this strategy, but it won't be the be all end all counter. It just gives the Scum player a chance. 50/50 chance