Hero tactics lacks two simple options:

Firstly, the option to choose a map. Why? Because Daubeny on the knight map is obnoxious and so is the background sound of the viking arena. The perfect one in my opinion is the Samurai arena, it doesn't just look good but it also is really quiet in terms of ambient sound.

Secondly, the option to choose the daylight for obvious reasons. Rain and darkness don't look as good as sunlight.

I wrote down my personal opinion so that people see there is a reason for picking a certain map + weather/daylight.

In conclusion: The same options that are given for the Training Arena should be available for Hero Tactics as well.