Shift + Alt and Ctrl+Shift is not an option for switching layouts on Gnome 3
For switching keyboard layouts the popular hotkeys Shift + Alt and Ctrl+Shift is not an option on Gnome 3. You can bind shift+alt+l or anything else but these hotkeys are available only via gnome-tweaks. It's bad for general ergonomics - you literally forcing users either to use win+space or to install gnome-tweaks. Pleas add an option to use shift+alt and ctrl+shift if a user desires so. This will improve ergonomics.