In terms of "skill" and versatility, yes, but unfortunately they feel a bit like hired guns, not a true band, even if many of them have been with Mark for many years. It's probably because they only meet for recordings and tours.
As for Glenn Worf, I never quite liked his style. Fantastic skills and all that, but he doesn't "groove" enough for me. And many of the DS songs feel just wrong without John Illsley. John isn't the greatest musician ever, but his style and sound were just right for so much of Mark's music.
Richard is great, but he very much only sticks to his part. It gives Mark predictability and lets Mark shine, which is exactly what support musicians are supposed to do, but Richard's approach feels a little lifeless. Too controlled.