I don't really mind the added strings / orchestrations on those records, which are guilty pleasures of mine.
I do mind the re-recorded rhythm sections. They make the whole thing seem cheap.
I can indeed make things sound a bit rinky if not done well. The Orbison album has a mixture of some vintage rhythm section elements (especially on the latter-era stuff like tracks produced by Jeff Lynne) along with some new, to mixed results. On something like Orbison's "A Love So Beautiful", the original backing track has very bombastic drums (recorded at a faster speed so they would sound extra bombastic when slowed down to original speed), so I can understand why they would not want to use those on a more delicate re-arrangement of the song.
The Orbison album is okay (I think the non-ballad songs sound pretty goofy with an orchestra generally speaking).
What I'm hoping the BB album either avoids or at least duplicates from the Orbison album is the use of modern singers to create "virtual duets." They did this with one Orbison track ("I Drove All Night"), and the duet version sounds pretty awful. However, they included two versions of the song, one with and one without the new singer. I appreciated that.