In the absence of table support in Notes, I sometimes rely on tabbing for a quasi-column effect. When I do so, the amount of times I tab over on the desktop app is inconsistently appearing in the mobile app. I'll tab 3 times on multiple lines, and in the mobile app it'll appear 2 or 3 different spacings.
Also, when I do bullet points in a note, it would be great to see those bullet points appear in the notes pop-ups when I hover on the desktop app. Basically a more accurate preview of the note.