I really enjoy the Brit Floyd shows and have seen 2-3 each tour but The Classic Rock Show is not for me. However good the musicians are, it is just a "greatest hits" concert. Real fans of the bands will prefer tributes to them, that play more of their songs, including album tracks and rarities. Many people that I've spoken with, at tribute band gigs, feel the same way.
One thing that does frustrate me about Brit Floyd shows is the predictability of so much of the setlists (e.g. every single concert that I've seen ends with Comfy and Run). I'd prefer to hear some of the lesser known songs, such as when I recently saw Think Floyd....no visuals but they played superbly and did Green is the Colour and Burning Bridges, then See Emily Play as an encore. They went down really well!
However, each to their own and I wish the Brit Floyd guys every success in whatever they choose to do.