I just wanted to say thank you for this vast improvement! I almost exclusively use VSTi as instruments (usually Kontakt) for my songs, and have gone the jBridge route to get 64-bit addins to work in the past. With limited success, sound was usually scrambled after a while and I couldn't get it to work every time. Your built-in bridge seems better in every aspect so far.
After downloading the new OMPT release eliminating the need for a third party bridge, I did a little stress test. To one of my songs, I used two VSTi instruments (both Kontakt) loading both with a bunch of instruments playing on top of each other. No problems except for when first playing a song, adding instruments while playing, or when playing more than 600 voices at the same time. I could then hear some stuttering and crackling, but I guess that could be related to Kontakt itself or my sound card. Different sound card options gave different results, ASIO4ALL seems to be working best for now.
I noticed that changing settings inside a VSTi will not mark the song as dirty (* unsaved). Manually clicking the Save button in those cases seems to save the settings though, so no biggie. Just thought you should know.