2. In the Warlord Tournament (and even in the Spring Cup), the limit is 4000+500. IMO: this is essentially unlimited. Moreover, easy battles are already offered without battles, allowing you to gain experience and avoid losses, and there isn't always a need to engage in them. Conclusion: the limit should be less than 4000+400.

What's wrong with an unlimited limit? I don't see anything wrong with it. Real life always interferes; your phone might ring during your turn, or something else might happen. Often, after playing against fierce opponents who dislike unlimited games, they themselves complain that they didn't have enough time due to real-life commitments... which seems a bit strange to me. On the contrary, playing with an unlimited limit is very convenient and doesn't differ significantly in terms of time compared to a limited game...