No. The CD is credited to the Royal Phil and that's what the main artist should be, so it's correct as it stands. The rest of the info can go in Notes where it already is. All the information is here, the CD is searchable - the only issue I can see is that it doesn't sit in the Beach Boys main discography (I don't think it should - and who the producer is is irrelevant) but that's not really a major problem, is it?
I wouldn't call this a Beach Boys release. Merely because it was produced by one of it's members. This clearly is a Royal Philharmonic Orchestra release with involvement from some of the Beach Boys members.. Mike Love, etc.
One note, I would've added the "feat." artists to Artist slot rather than placing in ( ), next to the song titles.
I'm not sure we can do that as it stands. We can't link the two artist names for fairly obvious reasons and we can't link an individual release into an artist discography.
However the details are in the Notes (and therefore searchable) so shouldn't be a major issue.
I would also be extremely reluctant to call this a Beach Boys release anyway.