I have noticed if you leave players out of the squad even for one game their morale drops slightly. Then I would have to use blue packs.

Should managers bother with rotation at all (unless there are injuries/drop in form/tiredness) ?

I have tried to give my squad game-time as it will improve thier skill points and make substitutions where I possible to give them a "run out". Particularly against poor opposition.

But I noticed sometimes the player substituted says he is "not about about it". Does this mean the morale of the player will be affected?

Should I just stick to exactly the same XI instead week in week out and not make any substitutions except for injuries or tactical reasons.