Trust me, I think the overall Despicable Me addition, especially SSFL, is fantastic. I love it, and having SSFL is extremely beneficial. I am just extremely underwhelmed by Minion Mayhem as a ride, especially compared to the experience T23D used to be. I guess it's just bitter sweet. I love the addition of SSFL and Despicable Me's great facades, etc, but I'm not a fan of the actual ride. It's a fun ride for me but unfortunately only if I'm in a good sweet spot. Otherwise, it's very mediocre.
As for Shrek, I'd really love to see it closed by the middle of 2017 with a replacement already designed. Be it a fancy Broadway-themed flex space theatre, or a new attraction to replace both Shrek and the Cartooniversal complex. Anything will be better. But I recognize why it's important to have it stick around for a bit longer.
I'm just hoping we'll get at least a few minor show enhancements during this facade/queue work.