Even pre-acquisition, Marvel has historically been much more litigious than Lucasfilm, so hard to say Disney is the reason for more recent C&D activities. I think Disney's experience with SW weekends at Disney World should certainly reinforce continuing their non-policy towards fan-made SW props and replicas; a recent announcement clarifying their position with the 501st is further evidence of that. Disney under Iger has always been a more hands-off approach with Pixar, Marvel, and now Lucas, so enforcing IP rights may be more up to those individual studios. The bottomline is, I believe Disney will allow fans to continue to play in this sandbox provided it isn't brand-damaging. When Iger's successor takes over in a few years though, who knows... could be a complete 180.
I'm starting to believe the new films are going in the right direction - original cast, throwbacks to the OT, new actors with talent, less CG and more practical FX - but hard to really believe anything until I see a first clip.
EDIT: Typed PT instead of OT, wow big mistake.