Hello!

I think it would be great if the tactics system could be made more advanced. For example, allowing multiple conditions for halftime adjustments (e.g., one if I’m winning, another if I’m losing), and even changes at other minutes of the match. The same could apply to player substitutions. This would make tactics more complex and rewarding for users who put more thought and effort into the game.

What do you think?

That would make the game more realistic, without doubt.

But are you sure it would also make it more complex? It seems quite the opposite to me. Now, you only have one shot at half time and you have to decide which condition to apply. For example, should I put a condition to secure the result if I'm winning, or rather a condition to change the approach if I'm losing?

If there were lots of possibilities, it seems trivial to me: just put every 5 minute a condition to play defensive if you are winning, and also a condition to attack more and change approach if you are losing, and maybe even conditional subs accordingly... no need to think about that too much. Most likely, the first one to score a goal would have a huge advantage

I think more formations could be a good idea. For example 4-2-3-1 or 4-4-2 Diamond. Like in Football Manager :) Add some roles, offensive and defensive, like dmc, or wb? In offensive we have only sc, but what about wingers? 
Option for the team to play basing on counterattack or ball possession?
I think this definitely would make the game more complex.