personally I've trained three different tactics with the same base roles and duties; a high press based off of the gegenpress preset, a mid block based off of the control possession preset, and a low block based off of the fluid counter preset. The high press and mid block are on balanced and the low block is on cautious. I switch between them largely based on feel; but typically if things are going well I don't change much at all. Why change if I'm winning the xG battle? The goals will come, or they won't, but if we play better than the other team, I leave things alone.
During the match, though, I do occasionally adjust a few things; sometimes I'll focus play depending on the opponents weaknesses (either formationally, tactically, or a certain player, or all of the above). Sometimes I'll use OI's and the pressing traps to funnel the ball to certain areas where I think I'm stronger. For instance funneling fullbacks onto their inside foot and trapping inside when the opponent looks weak in central areas, etc. Sometimes I'll move tempo a tick up or down, depending on how the opponent is pressing. Sometimes I'll change crossing instructions; either the type of crosses or checking hit early crosses.
I don't like to change duties and roles in desperation simply because I know the passing options are well-balanced the way they're setup, and changing them always seems to reduce the effectiveness of our attack.
I would say the breakdown of how I play my tactics is roughly:
at home - 15% gegen, 80% control possession, 5% fluid counter
away - 85% fluid counter, 10% gegen, 5% control possession
I don't have the exact preset options for each of those; I tinkered with them a tiny bit. Usually removing things like run at defense. I tend to leave most things unchecked and let the players play to their attributes, only making adjustments if things aren't going well and there's a pretty obvious thing to try out.