- Control groups should be unique (no unit should be allowed to be in 2 control groups at once). If an unit that is already in a control group is added to another control group, it should be removed from the previous control group.
- Shift+12345679 should add current selection to control group rather than add control group to current selection
i made a mod for turin that adds such hotkeys, but i don't recall if i ever uploaded it on faf. since the forum does not allow zips: https://ufile.io/qerp9hk6
- double tap shouldn't adjust zoom level (there's already a mod for this that is not in the vault: "Control Group Zoom Mod" by Softly, but it doesn't work for "select only factories from group x", although that particular hotkey shouldn't be necessary anyway once the next point is fixed...)
iirc addtional camera stuff v3.3 allows you to set a zoom level on double click (and triple click). not exactly what you want, but maybe better than the current situation