I don't think his there's anything earth shattering in there. MS have already said there won't be backwards compatibility in FSXI, and for good reason, if they keep trying to build in backwards compatibility for getting on 20 years of development they won't have time to work on the rest of the sim. The lack of backwards compatibility in FSX has forced the hardcore sim community in to two camps, those who're sticking with FS9 so that the vast range of add-ons they have based on 20 years of development work and those who using FSX as a stepping stone to FSXI and the chance to start afresh without a lot of legacy issues such as air files or just aren't concerned with not being able to use several gigs worth of add-ons.
As for his comments regarding the merge with CFS, I seem to remember blowing engines up in CFS1 and 2 which would imply he just wasn't trying hard enough! And I managed to blow one of the Reno Mustangs up in FSX within about 30 seconds from mishandling the engine.
Me I love the carrier ops in FSX Acceleration and hope it gets developed further in FSXI. At the end of the day if you're happy with FS9 that's great, I just don't think you need to slag of FSX to justify your decision because there're a lot of people out there using it and enjoying it.
I see your point, however as the victim of a tragic hard drive crash at just the right/wrong time I couldn't be bothered reinstalling both sims. If it wasn't for that I'd still have FS2004 as well. But I still think FSAviator is full of himself!