I sympathise. In Musicbrainz, getting it really, really right is often neither quick nor easy.
One workaround I rely on is to do the best I can within my time budget, then make notes in the annotation. Think that your new Release might share recordings with some older Release? Make a note in the annotation, with a link to the older Release. Have a list of recording engineers etc. that you can’t be bothered to enter as Relationships? List their names and credits in the annotation. It gives someone a fighting chance to complete the work later.
Another workaround is to place a higher priority on scanning and uploading more of the cover art. The back cover, and a couple of pages of the liner not book, often list a lot of detail about the Release. Once the scanned images are up as cover art, someone else can read them and finish the job.
A workaround for when I want to take my time getting it right, and don’t want MusicBrainz or my browser throwing away work, is to do my research and make notes in a text file of the URLs of the Recordings and Artists to which I want to link. Then I can turn the editing task into quick data entry guided by research notes, rather than have it be slow research.
In many search boxes, you can paste a MusicBrainz URL to reliably get a certain result. For instance, paste in “https://musicbrainz.org/artist/b972f589-fb0e-474e-b64a-803b0364fa75” instead of typing in “Mozart”. You will get your intended result, quickly and certainly. That’s why I make a point of putting URLs in my research notes.
We appreciate your contributions. Every nugget you add is something MusicbBrainz has, which it otherwise might have lacked.