That is not quite true that Freddie's solo work was praised. Freddie used some german, unknown musicians from the streets as well.. with the result being his solo work was not sounding like it should have done. I don't think Brian was too happy that Freddie used an amateur guitarist. The exception was the Barcelona album, which had a very high quality production, professional musicians, including John Deacon on bass guitar for the track "How Can I Go On".
Listen to the guitar solo from 3:23.... not even in tune. Surely Freddie could have used some better musicians.
I don't recall Roger saying anything about the Brian May band either. But Brian had the best drummer in the World, mr. Cozy Powell (RIP), and the great Neil Murray.
If you compare all the band member's solo collaborations, there is no doubt that Brian had the best musicians, and the best production. Roger is best when he is 100% solo, and playing all the instruments himself.
That said, I think Roger's Fun In Space and Electric Fire are the two most interesting solo projects, lyrically and musically. Brian had the best production, while Freddie wrote the most catchy songs.
Add all of them together, + John Deacon and you have Queen.
