I've liked the UI changes so far. I do find the being able to see inside the container and click on the objects doesn't work always like expected, so just always go to Edit, and would prefer it be the default behavior.
I wanted to comment back to GregObleshchuk - I disagree they should raise the 40 activity limit. It does take some getting used to coming from SSIS, but it makes you be much more intentional about your design and more functional and idempotent. For example, you can't scope variables or do things like If inside ForEach, so it forces you to have parent-child pipelines and think about a pipeline as one discrete activity. I think for data engineers that is better and similar to the way the rest of the industry is. I hope they keep 40, it seems arbitrary, but I'd almost be for fewer, I have double digit activities in a pipeline, I'm doing something wrong.