Really? I'd like to hear more about that. I don't follow Meet & Greet's that closely, so I wasn't aware. It must be in permanent locations - which ones are set up to do that?
It seems a no-brainer, to me. As much as Princess Hall replacing my favorite ride (SWSA) pains me (the only thing that keeps me happy is that the superior DL version is still there), the demand for these character meets is certainly there, and I think anything to keep them as contained as possible is good for all parties. And for the good of those parties who take part in them, have as many redundant rooms as possible set up.
To be honest, I don't know if the reduction in entertainment vs. meet and greets is really that surprising, as we are constantly told - audiences are changing. I somewhat disagree with that notion when it comes to quality theme park rides (not everyone, even every kid, wants a Haunted Mansion filled with interactive "chase the ghost" video screens replacing sets), but when it comes to shows - there just isn't the audience there once was that is willing to sit for an hour to watch Mickey and Minnie dance with a troop of aspiring singers/dancers to redone pop hits (or even Disney music, as it's so ubiquitous around the parks). (We touched on that earlier when discussing how Orlando isn't exactly the place to be for young performers as it was for a time there in the 90's).
Folks want to see, feel, touch, take "selfies", etc. directly with the characters as opposed to see them in stage shows. The thing is, the overall theme parks were never designed for this (they tried with AK, but Avatar ate it), so I say give the folks what they want...but while Disney is perfectly content is doing them in the cheapest way possible (and when they go the other way, we have the bog of a mess that is BOG), when they just need to re-purpose a few buildings, line up rooms with multiple versions of all the demanded characters, and you take the "issue" of M&G pretty much away for everyone (those that live for them, and those that loathe them).