Though it may or may not help with your particular use cases, various potential workarounds for column view width limitations were discussed in this thread:
Are there any plans to update DEVONthink’s interface? It remains very difficult to browse a group of notes in list view, and cast your eye over them to see what’s there.
I’m thinking principally of the titles and summary information . This is very poor. You just need to see the title of a note properly! How difficult can it be?
DEVONthink has many good things going for it. Replicants are useful. The encryption of items synced to cloud servers is very good. The application is pretty solid…