just hire the new one, 10 should be better than 9 , or not?
is it unknown, how much an additional trainer level boost your training speed. So you cann't ansewer that for sure. I would think, it isn't worth it, but i did cause i got an national player.
because of the players salaries just popped after the allstar game, and the 8 med, i needed for a couple of my starters to get back on court...
The medic just works, at the moment your starters get injured, so if it your target to heal then fast you waste your money.