This is incorrect, you’re mixing migrations and tab behavior. Migrations were mostly fine aside from the tabbed images, which we already fixed in 2.0.1.
Indenting bullet points, todos, and images making the line into code is 100% intended and a part of the CommonMark specs.
We’re not aware of Shift + Tab not working, do you have any example for it? Keep in mind that Shift + Tab always worked only on list items.
I don’t think anyone in the team ever said that “you are using it wrong”, but it’s indeed a part of the CommonMark specifications.
There are plenty of changes from 1 to 2, but 99% of the app is working as before or better and aside from the tab changes (which we agree are not ideal and we’re trying to improve them) there are no big gripes from the feedback we’re getting 
As always we’re here to discuss how to improve the app and Bear 2 is not the arrival, but it’s the starting of something new.