I've been thinking about this over night. And while we won't have answers until Toy Fair, and maybe never, here's my thoughts...
If producing high quality obscure background characters, EU characters, characters from cut-scenes, and any other odd segment of the 3.75 collection is profitable for Hasbro, they would continue.
Obviously, it isn't. If they need to move the scale to more kid friendly assortment and less articulation to keep SW going, then that's what they need to do. They are a business, and business needs to make money.
Honestly, if they said tomorrow that 3.75 figures are done, and there would be no more, I'd be bummed, but I would also be shocked of the ride we've had since 1995. We have toys that I never imagined being made.
The 6 inch line just seems like another idea that they want to try. Personally, I'm in. 8-16 figures a year is nothing.
Also, I'm shocked about the nastiness I am seeing aimed at Hasbro SW team members. Sure DePreist made a snide comment about the 15th Cantina guy, but how many times has this guy been called an "idiot" or "moron" or "evil" in SW forums. People seem to think it's all his fault. It's also his fault that we got the BMF.