I highly doubt it. Primarily because if that was a Disney concern, they would not push the Christmas holiday's so much in the parks and get the decorations up as early as they do.
I know it has always been a touchy topic. I was raised Catholic and my wife is Jewish and we were in
Disneyland last year over the holidays. She personally thinks what they do is a little overwhelming, one example being how It's a Small World changes everything. For her though it is something she has been used to since she was a kid, between shopping malls, commercials, TV Shows, etc. I do agree that those who are not Christian, definitely get the short end of the stick as you don't see things like a complete make over of the Haunted Mansion to celebrate Channukah, Ramamdan or the winter holiday's of those faiths. But I guess it will be something that will never change being such a United States / Commercial thing more than anything else.
So aside from my babbling, I just think the changes to VMK is just taking development a little longer than expected, especially with such a focus to get Frontierland and Tomorrowland up and running as well.