In real life, when hiring a coach, you ask for a specific skills of him. Something like: "I need a coach to work with youngsters, or a coach to train physical skills, or mental etc.". You don't just take the first talented coach, not knowing what is he talented for.
My point is when we want to spend 700k or 120 credits for a coach, we should have option to specify some general prerequisites. I don't think we should specify a mark for specific skill, but only to specify what should be specialty of that coach we are looking for. For instance, if I specify "Attacking", my future coach should have 15-20 for that skill.
After all, we are buying 120 credits coach once in 4-5 seasons (if not a premium manager), it would be fair to have a little choice of what we buy.
Waiting for your opinion...