Regardless of feedback, you should trial the software yourself. I set aside a project to play with this weekend to run the rims off Neutron, and bought the MPB2 only 2 days into it because I was more than satisfied with what I wanted to test. For my situation, I had Ozone 5 Advanced (so had Insight), as well as the Nectar 2 Production Suite previously. Nectar 2 has gotten extensive use from me for a couple years. The Pitch Editor I have had no use for, but found the Breath Control useful for voice overs. For vocal work, the N2PS has already paid for itself.
The "Advanced" versions of Neutron and Ozone 7 included with the MPB2 was a key selling point for me because the potential CPU usage of the entire plugin. I wanted to have the ability to insert specific modules surgically rather than be forced to use the entire thing. Vocalsynth, Trash 2, and the RX Plug-in Pack will get limited usage from me (at least short term) because they are very focused in intended use. The MPB2, in essence, is similar to the previous offering (track use, vocal specific, and mastering), but with perks.
The VST2 issue with the 64-bit Neutron is known, which can be resolved using the VST3 version in SONAR. I actually tested the 32-bit VST2 in Audition 4 and had no issues with it, but do not have 32-bit SONAR loaded to verify. Again, the trial to prove to yourself is paramount to your satisfaction.
I had actually trialed Ozone 7 Advanced when it first hit the streets but passed on it. The only thing that bothers me with it is that the EQ matching seems to be only in the "entire" plugin rather than the EQ module. The Ozone 5 EQ module has it, and has gotten a lot more use lately than I initially thought it would, but it is not something that others may even know or care about. Since O5 and O7 cohabitate without issues, that point is moot for me.