CPU attack variety is an issue every year and one of FIFA's weakest aspects. I don't have an interest in testing team tactic settings, I never thought they worked all that great anyway. So I just adjust line sliders depending on the team. I raise the CPU length slider for attack-oriented teams (3 FW, AMF), this pushes CPU FWs and MFs up. For defense-oriented teams (2 DMF, 1 FW) I lower the CPU height slider, this drops CPU defenders back towards their goal. Also, if you raise your line sliders, it pushes your team forward into an attack position. This will eliminate some of the tiki taka as the CPU will try to take advantage and use more long balls.
Another way to improve CPU attack behavior and positioning is to switch up the traditional LB LCB RCB RB positional values. By default, CBs in FIFA hang too far back at midfield and don't push forward when their team is attacking. Change that by re-assigning defender formation assignments to LWB LB RB RWB (high attack). To leave one CB back while the second presses (balanced attack), change to LWB LCB RB RWB or LWB LB RCB RWB. This is another way to not only bring some variety to CPU play, but to get you to change up your own tactics and formation. A CPU team with a LWB LB RB RWB setup will push way up and will be vulnerable to quick counter attacks, for example.
Honestly, I haven't edited much this year. The default game play is pretty good. I reverted back to default speed ratings for now, I just lowered agility and aggression and that's about it. I might spend time testing player assignment settings, see if they actually work as advertised.