What are the must-have quality of life features in an RTS?

[kazzaxf630]

I'm currently developing an RTS, and I would like to know what quality of life and unit control elements you think any classic RTS should have, as I aim to include as many as possible in our game.
Some of the features we already have or plan to include are:

Grouping units with Ctrl + Number key.

Double-clicking a unit to select all similar units on screen.

Attack move (Attack button + left-click), where units engage any enemies they encounter while moving to their destination.

Hold position, where the unit attacks enemies in range without moving.

Key remapping controls.