creatively Free worked as a pure blues style in usage of Paul Rodger's incredible vocals. After the guitarist died, he and the bassist went on to join King Crimson's drummer and Mott the Hoople's guitarist in a supergroup called Bad Company, which in tern equalled or even surpassed Free's length of tenure and quality of great music. It wasn't as pure, but the PR voice mixes really well with that era of Mott/Bowie/Queen/T.Rex glamour art rock, and somehow the collaboration worked brilliantly. Blues legend Jimmy Page later joined Paul for two albums under the band title: The Firm and the world of blues' greatest voice and guitar men went together like nothing we thought it would, producing an album that left one to believe Page at least was damaged creatively, so far gone from his Zeppelin level of songwriting. Still further on during his solo career he had a 3rd supergroup act with one of the Who members and called themselves the Law, and the best I remember was that it wasn't that appealing.
Now after proving a perfect match in each taking on union in helping the other recreate their catalogue, Brian Man and Roger Taylor have suddenly shown a 2nd shocking lack of studio cohesiveness in writing material with Paul, though sadly it seems like neither party really tried to push themselves. I say this because Electric Fire and Another World were the last solo works of RT and BM and they appear to be out of the Cosmos Rocks' league in terms of good quality.
I think the problems are the lack of evolution as a lyricist on Paul's part, the lack of realizing that it shouldn't be Queen doing Blues, it should be the Blues singer doing Queenish rock, adding Blues vocally while May changes nothing much of his style, and Taylor pushes his style against the Blues since it's an even harder match than May who occasionally did blues work ranging between generic stuff that darkens his catalogue like nothing else, to the 3 or so awesome tracks that peaked with Nothing But Blue and The Night Comes Down.
It's as if Brian and Roger decided to alter some common tunes abnormal for Queen, play a lot of Paul's weaker creations, and be as unintrusive as they can as if out of politeness.
I expected a record amount of blues but JESUS CHRIST.