This is very problematic to our workflow. Please see my post below:
and this (Editing multiple tasks after the recent update - #6 by Nicolas_Fischer) similar one. The Asana’s proposed “fix” for the issue at hand is not helpful as it forces us to treat asana like a huge excel spreadsheet when we have lots of fields and tags to work with. Lots of activating and deactivating shown fields in the project view would be necessary, and would be a massive pain for us.
Please revert this, or at least give us the option to view the details section again when selecting multiple tasks.