I think part of the reason they kept Clone Wars as canon (I honestly doubt Lucas was as adamant about it as he was about the PT itself) is because they plan to use it and it's going to be their touchstone to that era more than the films. I expect that they'll take from OT, Clone Wars, then the PT in that order. At least for the near future.
I find myself swayed by your point. I can see Disney really not wanting to de-canonize the current kid-friendly TV show, the most active part of the 4 billion property they were buying. It would be silly business-wise to do so, actually..... especially circa 2012/2013 when it was the current face of modern Star Wars.
I don't know if that means they have immediate plans to cash in on that... but you certainly don't strike it from existence, like you are free to do so with culturally irrelevant books and games from the 90s.
In 10 years? I bet we'll be getting a bunch of jar jar crap. Believe it or not, the kids who grew up with the PT as their only/primary introduction to Star Wars will eat it right the fuck up.
This is where I divert from you... I don't think the Prequel generation likes Jar Jar either! (or all aspects of the prequels... and yes, I know Jar Jar was just your example there)
Anakin and young Obi? Yes. Asoka and the Clone Wars? Sure. Some elements are certainly the Star Wars for a current generation.
But even kids didn't love Jar Jar and a lot of the iffy prequel stuff that the older fans complain about. For all the "kids love the prequels and it's the same as the OT was for 80s kids" talk I've heard, I don't think it's actually true. Jar Jar didn't register as a favorite in the kids' zeitgeist at all. Having a Barney-like character in Star Wars was an experiment that really didn't work.... while it may have snagged a bunch of early childhood viewers, those viewers would come to hate those elements after the age of 10.
And let's reflect that we already had a generation of young kids grow up on the prequels, and they're now in their 20s. Not a whole lot of un-critical fondness there, really! Actually, they usually tend to come around to the views of the older Star Wars fans.
I think the prequels can be tapped as a
minor vein of nostalgia someday. But I don't think there is this coming junior wave of super-love for everything prequel. The first generation who grew up on that is already here with us on GAF right now and they're not sucking at Jar Jar's teat (yes that image is in your mind now).
On the contrary... I think Disney sees that Star Wars can be a stronger brand by restoring it back to the elements that represented it in the 70s-80s... Those who love the prequels love the Jedi aspect the most, and that is fully present in a future trilogy era that stays close to the OT cloth.
Even aside from marketing-based decisions (which I don't think favor the prequels as much as you'd say), I think the ideology of all the people within Disney and without are mandating a return to what Star Wars
was. That will be the way forward for the brand from now on... and that kind of approach will probably catch all of those who were introduced through the prequels anyway.