From my experience, synths with lots of patches are primarily filled with bad ones, so it just takes longer to wade through all those patches to find the few gems. There's a few exceptions I can think of, but not many- and those are synths where patches have piled up over many years. I haven't seen any new synth hit the market that ships with 5000 spectacular patches right away. And I doubt this will ever happen
Btw, we're working on a first sound expansion for Dune 2, should be out in September.