Now that is an extensive bug report. :o
Thank you so much SmokingFrog! This is super helpful and many of it will definitely find its way into the next release(s).
I converted everything you mentioned into tasks for bugfixes in our planning tool and also added it to the list of known issues in this thread.
Apart from that: I'm glad you enjoyed it even in this early stage! :)
It's like you already said: The real magic of the game unfolds when playing the heroes with your friends. This will also improve for singleplayer experiences when we find time to improve all the AIs (which is part of the roadmap).
Thank you again for the support!