I guess the question is whether or not getting access to those airlines who only recruit from hold pools is worth it. At the moment at L3 for example, Royal Brunei, Wizzair and Turkish Airlines aren't (for me at least) really worth the extra £30,000 or so the integrated course will cost.
That's the key point I think. If you've got the money then integrated was probably worth it when leading airlines were recruiting only from the major integrated schools. Increasingly this isn't the case, removing their USP.