The basic training content is indeed part of the problem - too greater emphasis on completing the disproportionate solo cross-country element (typically navigating (by satellite) to the same destinations and turning-points over sparse, practically featureless landscapes) with far too little G/H in place beforehand only leads to practicing bad habits picked up in the early hours of training which cannot be corrected adequately as the instructors simply don't get a chance. This is no criticism of instructional standards - simply a case of insufficient time to teach the air exercises thoroughly enough before the solo components. By far the majority of the CPL course is spent engaged in straight and level and this is one of the root causes that needs to be addressed. MPL - even less basic handling. UPRT is a 'Bandaid' to a far greater issue which needs addressing properly, as RAT 5 suggests, and with the increasing emphasis on CDA and 4D trajectory based traffic management, it's one that needs addressing soon.
fokker1000 - TG still takes the C150A out for a 'spin' or two on Saturdays I understand