Hello Palpou, greetings to our neigbours!
We're very glad to hear that you enjoy the new version, always nice ot hear that people like it.
Concerning 3.):
Sorry, but we won't do it. The problem is that people would want us to add all the new stuff from 4.0 (like skins, maps, abilities...) to 3.81 and also fix the bugs and balancing issues of 3.81.
For us this would mean: Much more work.
And sadly we don't have time for this, therefore we are always just supporting the newest version. (there would be a lot of angry users, when we'ld make 3.81 again an 'official' addition at the launcher, but wouldn't support it otherwise)
Concerning 7:
Yep, that was the plan of the current version.^^ In earlier versions and even int he vanilla games, most people just fought against brutal, as this AI was quite easy. We wanted to give people a reason to also fight lower AIs and also wanted good players to give a challenge. So we made all the AIs a bit more difficult.
Concerning 11:
Yeah, some of the tasks are har - but you don't have to get them all! There are more tasks than level to gain. Therefore oyu can always skip some of them.