"Judging a book by its cover" and "throwing out the baby with the bath-water" aside, what did you think of the lateral/rotational stuff in Boyle's book?
I also have a Ross Enamait book. The cover looks like he zipped if off using an old MS Word program and his first description on how to squat is flat out, totally, "Matt Furey"-esque, wrong. If I'd dismissed it based on this then I wouldn't have it as one of the best anaerobic training manuals I've come across to date.
With regards to isolation v. functionality. IMO, the two concepts aren't always mutually exclusive. An Abmat situp could be labeled 'isolation work' but does that mean it makes no contribution to functionality? Heavy squats tell me they do.