FM27 Tactical Tweaks and Training
Football Manager 27 uses two official phrases that searches mix together. Tactical tweaks are the in-match adjustments and the way the engine shows them. Tactical effectiveness is the training idea: how well the squad has absorbed the shape you picked, not just whether the roles look right on the tactic screen.
The training dive is the one to read if you want the effectiveness model. The match-engine dive is the one to read if you want movement, skill choices and tempo. I am not merging them into a single 'best tactic' because the official pages do not publish a best shape.
Roles and team instructions still exist. What changed, according to those dives, is the feedback you get when a tweak does not fit the players, and the training time required before a new shape is effective. Eurogamer's preview interview is about that loop. It is a preview, dated before the 10 November release.
If you want a 4-3-3 with named roles, use the tactics library. That page is a reading of a published community shape, labelled as such. It is not this system page, and it is not a file you import from here.
What is tactical effectiveness?
The official training dive's name for how prepared the squad is to play the chosen shape.
Does FM27 pick a best formation?
No official page names one. Community shapes are a different section of this site.
Where do tweaks show up?
In the match engine dive, as movement and player choices, not only as menu text.