— & GetDisplayY
— & MouseVelocityY
Flags
Fixed Families
'Browse...' button in 'Construct: New action' window (always, when user want to generate file path)
Fixed collision mode changing in Event Sheet Editor (it won't work)
— on 'Events' tab on the top menu will bring view to 'Event Sheet Editor', like clicking on 'Layout' will bring to 'Layout Editor'
I think for your first point you either want ScrollX/Y as mentioned, or maybe the Window or System plugins. Flags is probably something you want from MMF2 (they're actually called booleans). They would be nice but aren't necessary as you can just use more variables.
I agree that I want Families working, they're kind of broken or at least unstable right now.