Over Training You need to be careful while planning your training. Better don't over train your players who regularly features in your first team and can do power training on those who are on sub or reserves (But don't overdo it). You can customize your training by defining the intensity of each player. Friendly match are a good way to understand your team strength and weakness and to prepare your team formation to counter particular attack plus you get some bonuses in form of rest, morale boosters & treatments. You can open any new topic you wish to pertaining to top eleven. We believe in democracy!

Red and Blue arrows do have a impact. For ex if you are playing wing based formation like 442, 541V, 352v... putting red arrows on wingers and st helps them to get better ratings.

Yes you are right while playing defensive or normal mentality use counter attack options.

If you have a special ability in a player like free kick specialist, corner specialist or penalty specialist assign them a designated role. In case you don't have a player with special ability then your though process is right. You have a player Gokhan in your team who is corner specialist place him in corner kick order section.

And Philip is so right.