Maximus you seem to be contradicting yourself. You obviously believe that "a lot" of 150 hour trained CPLs are not competent and then you suggest that removing CSU training would make them better pilots? What would you suggest that they use the additional time doing?
By suggesting an arbitrary figure of 250 hours for a CPL you have failed to identify what the deficiencies are now and how another 100 hours would be used to rectify them.
If you do not know why they require CSU/complex aircraft time then I suggest that you are not really qualified to comment. Sure you are entitled to an opinion but in the interests of perspective...
How many 150 hour CPL holders have you flown with that makes you feel qualified to belittle "a lot" of them? What sort of licence do you have and what kind of flying do you do?