I'm sure those who were there enjoyed the show, and that's the main thing. There are certain Glenn songs I can imagine someone else singing. Then there are songs that IMHO are so "Glenn" that it's almost painful to listen to somebody else sing them - certainly under the name "Eagles". Lyin' Eyes is one of them. You can give it a perfect country interpretation, but it's nothing special. (Glenn wasn't a traditional country singer.)
I would have preferred more Deacon and less Vince, because IMO they couldn't convincingly fill the gap left by Glenn musically, but they could sort of fill it emotionally with Deacon. Incidentally, I love Deacon's mid-70's Glenn look with those sunglasses.
But I'm glad for the people who were there and enjoyed a show. I don't feel that something sacrilegious was done. Glenn's legacy still remains.