The remaining issue is however the fact there's difficulty increases during the career. Starting a career on Rookie just so that it never goes above Pro might have to be what some do who find the jump to Veteran and loss of bowling aids too difficult.
In future editions it would be nice if there was a more fine grained adaptive difficulty, not simply go up a level when you go up a tier. It should be based on how well you're performing in matches - if you are constantly thrashing the AI, you should be moved up until you stop, but if you're losing on Pro, you shouldn't be bumped up to Veteran just because you did well enough for an international call up.