Gone fishing
A pilot who has done next to no solo flying simply has not got enough experience to handle a jet airliner, the guys from the integrated course have enough trouble doing so.
How the hell do you think that this beancounter derived couse is going to equipe you to fly on a good high workload day in the UK let alone a dirty night in the Greek islands? You will simply not have enough real flying decision experiance to fall back on.
In the USA most FO's have 1500-2000 hours flying in turboprops before getting into a jet so why in a more demanding enviroment of Europe are we looking at putting next to zero hour pilots in the right seat of an airliner?
The answer is money ...............and the airlines will pay in terms of a rising inccident/accident rate. Only then will the insurance company's set the minimum hour requirement for pilots and those who are in the second wave of MPL training will find them selfs with an MPL and no chance of a job and unable to even fly for fun because they won't even get a PPL out of this.