So, as much as I agree with some of your observations you are sadly misinformed or misjudging the situation.
Firstly, we are not bidding farewell to the "animated" versions of Flora, Fauna and Merryweather, they will continue to be part of the Fantillusion parade. The reason they are in face on the new Aurora Christmas Wish show, is purely artistic. There were trials using both versions and the final decision from show directors, managers etc was that the face version were much more suited to this show. I don't know how you can assume this is a cost-cutting measure; it is infact the opposite. But they feel it’s worth the extra expense to have a more authentic and real element to this show.
However, it’s not at all a new concept to have the fairies in face, they existed in the park since 1994! Albeit rarely, I could only find pictures from 2003, but still that was 8 years ago
http://disneyphotography.com/gallery/thumbnails-59.html it’s not a new concept.
I can't comment on the casting of the characters, however you shouldn't forget, if you’re worried about the shareholders and money - it’s not a great economy to hire and pay 3 old woman a full day wage just to perform in a 7 minute show. These girls need to be multifunctional, and do lots of agile and physical things throughout the rest of their day, a 70 year old woman would certainly not be suitable casting to fill all the other daily duties. Don't forget Disney is trying to save money here.
Same goes for fairy godmother, while it would be nice to have a few older ones in Paris - it’s not practical, due to the other tasks required in the Paris entertainment dept, the job isn't really suitable for older people.
I agree that it is bizarre having 2 versions of the same character in the park, but don't forget Captain Hook and Mr Smee were also in face version way back in 2003 on the old Peter Pan show, so it’s been happening for years, and in the other parks also; Dream Along with Mickey in WDW for example.
So, it’s each to their own, some people love the face characters, they feel like they get much more magical experience being able to interact, chat and see a real person! Others prefer the more "animated" version, luckily there is more and more chance to see both, confusing as it may be.... but don't worry Mickey's not going for plastic surgery anytime soon!