Hoping they add a toggle-able setting to switch all hotkeys to grid and adjust it like with what exists in SC2. Considering the massive number of structures/buildings/units/etc in both campaign and multiplayer, grid has always made alot of sense to make hotkeys much easier. While there are 3rd party tools that allow this it does not work for custom games and can be infected with malware.
they already confirmed that we will be getting a new UI for hotkey customization just like starcraft remastered, and also possibly a customizable HuD… for now you can use the following guide
Yes, they are improving the hotkey system, and I guess it’s quite safe to expect something similar to what they have in SC2.