The thing is, Tyrone, that once bugs are ironed out and as the need for new features diminishes over time, plug quality and quantity enhancement's about all there's left to do.
I've got a friend who runs PTLE. He's keeps raving about Expand!, which I think has multiple synthesis engines, and is a sort of HQ bread-and-butter VI.
Then there's Strike, digi's drum VI, something I sure hope MOTU will address in light of Model12's "lite" status.
Digi offers expansion packs for these sorts of things (and there are other VIs too), so at the very least, MOTU could do similarly with its commercial VIs.
I still believe that a greatly-enhanced baseline plug/VI set, with the option of perhaps upgrading to MOTU's existing commercial VIs, would be a sound move.
As I said earlier, there'd be no real need for MOTU to remove said plugs from the market anyway. In fact, the potential increase in overall sales and exposure could even allow a price drop on the already-well-priced range, thus furthering MOTU's cause, well, further.
That reminds me: Is there an option to buy all of MOTU's VIs at an all-in-one-bundle price?