I think adding tempo ruined the tactical control it became boring

so you never noticed that the old mentality option was what is now tempo, just with the wrong name.

I mean if we get too deep into the details of tactics it gets a bit boring

If you play with balanced mentality the tactic editor is exactly the same as before

Thank you, what is the positive and negative effect if I play at a fast or slow tempo ?

The effects are not described, like mentality was, just the meaning in the quantity of build ups your team can make.

For example, does fast tempo mean accelerating the attack to be a counterattack, or is it just an attempt to end the attack quickly, regardless of its outcome?