I've been having a little experiment and playing around with using Touchline Shouts with no tactical instructions*.
* No tactical instructions here means no TIs, PIs or OIs used and Mentality left on Balanced.
All I've done is pick a team, a formation and thrown together some player roles & duties. Then during matches I just use touchline shouts, no other changes (apart from subs). I've never done this before so I wanted to see two things:
1) The effect of using no TIs, PIs