all the fields are set in the right-hand side in the new Jira view .
To have Text fields (multi-line) in that location is a very bad decision.
These text fields sometimes have a lot of text and it's very hard for users to read in this new location.
The current location (in the left panel ) is more clear to read these kind of text fields
Please, consider to move back these kind of customText fields (multi-line) fields to the left-hand side area (as in the old view) or to able a way to resize the right-hand side to be more width... or have the capability to resize this side .