Hi, great feedback. No, that doesn't sound right, thank you for flagging. The tactical familiarity should be driven by the whole team, not a specific small group of players. A team using (and training) such tactic should grow its familiarity, and a drop in that should only come when a different tactic is used for a few games.
I am issuing a fix to that tonight.
As a side note: I am working on a new match engine, where there will be a lot more pitch action and the flow will be far more natural.