Favorites in battle! - 5 The Battle of Favorites! - 5

With the third HD mod, you can't save the game during the blue player's turn. And someone even said that such saves are not advisable.

I said that. There's no need to save during the blue player's turn; it's enough to save during your own turn when you're playing as red.
To check the map for blockages and the presence of roads when the red opponent is creating it, you can wait for him to exit the game, get your turn, and then save.
It's probably really impossible to check if the red player has a hero above level 1. You can ask the opponent to make a save and send it to you.
You can also, based on the fact that such restarts are taken immediately and usually due to a weak army and the absence of a level 2 dwelling, play as Warlock; there are no problems with that.