One other advantage, especially for longball/EC teams,of an MA or UT is that the FW can be developed in MF rather than weakening your FW line.   But yes their biggest advantage is shooting strongly from the furthest back they can.

Maybe there could also be a "sponsorship" for a superstar.  Develop (have?) 3 (4?) or more Age 0, coached to SL17+, at the end of the season  then you can sign a superstar the next, as your academy has shown proficiency and can attract the best.  Creates a dilemma that your free 40TP are then tied up, and you will be unlikely to achieve it year after year.

If it is "have" that might stimulate the market for Age 0 players.