We already have OR but it is still a bit buggy and needs some fixing around (thats why we do not publicly advertise it) — https://stockrow.com/screener/2ca1a6ad-3855-4baa-ae2e-710bfb...
As for the rest — we are slowly tackling these and will add them along the way no ETAs though since we it's a hobby project
It would be nice to have "or" expressions for merging two expressions.
Also, an option for all results without pagination seems useful.
Finally, JSON and CSV export would be cool too.
(Feedback also sent within the app.)