I've been out of the qual loop in the Harrier for awhile, but essentially there are X number of T&R codes that must be completed before a pilot can get a qual. Some of them are very poorly thought out, irrelevant to current requirements, and do not allow sufficient intervention by leadership to either speed up a guy who's ready, or slow down/eliminate a guy who's not.
Best example is the A/A stuff. There are multiple codes required to make SL, when it's not required for current deployments, is a completely perishable skill set, and detracts from essential training in a resource constrained environment. We had a bunch of guys (like Squeeze) stuck at "almost section lead" for months while we were short on qualified flight leads. This ended up flying the crap out of department heads like me (thanks, ops!) while the very guys who actually needed the hours were stuck waiting on training that they really didn't need.
A CO ought to be able to make designations like that without subjecting the designee to the wrath of a MAWTS IP on subsequent quals.
It also leads to resource sucking quals like ACT(I) that drain the squadron of aircraft and flight time just so we can make more of the same useless quals later.