Well, there certainly seems to be a bit of undercover market research going on here JAS so... if you're thinking of getting into the market, here's something to think about:-
Theres a great deal of difference between what the market wants and what the market needs!

It's quite clear that what the market wants is .90 sized pattern planes for much of the reasons already stated above and there are indeed several to choose from. In fact there hardly seems to be one months that passes without somebody offering yet another remodeled or re branded China made "F3A type aerobatic model" for your .90 sized engine! What he market actually NEEDS is something one size up. The 1.20-1.40 size.
Todays F3A wide bodies designs are designed to be powered by todays serious and expensive motors... a 1.60DZ or their even more expensive electric equivalent. Sure they can be "flown" on the older type engines, a 1.40FZ or similar but their physical size demands far more power as you're well aware. That leave us with a challenge... what does one do with all those old yet wonderful engines?
Supply the pattern market with something that's one serious step up from the .90 "hobby" pattern models yet one step below the F07 design influenced 1.60's!
There's a huge gapping hole waiting for somebody to fill. They wont get rich.... but they will be given a standing ovation!