It’s nice that the game is aware of shortcut conflicts, but it’s too restrictive in some cases. Most notably:
“Select all Mosques” and “Select all Monasteries” cannot be mapped to the same key, but it makes perfect sense to map them to the same key because a civ can only have one of the two and they are equivalent. Same thing for university and madrasa or mill and hunting cabin.
This might be a bit more controversial than the examples above, but I think it makes sense to allow having a hotkey like “select all archery ranges” as “A” which conflicts with a grid hotkey. Whenever the grid is open (e.g. if you select a production building or the building menu of a villager), the grid hotkey should win. But if the gird isn’t open, the “A” key selects all archery ranges.