Having been involved in training ab initio cadets with varying 200-hour backgrounds onto the 737, I have for better or worse, formed the opinion that a lot more than "standard" simulator endorsement programs can go a long way to reducing the problems you see in early line training.
A truncated quickie endorsement might be acceptable for a current and experienced jet pilot (or a cadet if the emphasis principally is on button pressing) but the cadet expected to demonstrate any level of manipulative or planning competence generally doesn't start to get it together until around 15-20 sessions. A sensible LOFT program of sim sessions can put a bit of procedural and manipulative polish into the equation ... not much depth, of course ... but, at least, the training captain doesn't have to start from scratch on the line.
Cheap insurance I would suggest .... but, sadly, the almighty dollar appears to win the day in most cases it appears ...