Yes and no. I agree a lot of the charm is gone, but I think unfortunately the days of charm are over (with some exception that shows up as surprises here and there.) But I do think the company turns out a quality product more than not.
But for example, in the case of Star Wars they could have very easily gone with the original plans of doing a half-baked redo of Tomorrowland with Star Wars crammed in there and a lame Millennium Falcon plunked on top of the old Peoplemover Station. Instead we got a (depnding on your personal taste) fairly cool temporary Tomorrowland overlay, some really nice, intricate re-working of the ROA, a new Big Thunder Trail, and updated Disneyland RR... all in preparation of a massively intricate immersive new land. None of that really had to happen, especially with the level of attention they each received. SWL could have been smaller, there could have been one attraction instead of two, less to explore, etc. It could have all been done cheaper and with less quality.
Quality product, however, is extremely different than an individual's taste and like of said product. And you are right, not all of it is up to snuff... some of it is half way there, some of it is a total miss. I think that's always been the case though. For every great project, there is an equally lame one waiting to be ripped apart.
I wish I could say everything I've done in my life and in my career was great and up to the standards it should be, I'd be lying if I did though!