- Spoilers are armed in the after start check list everytime, so they are always armed for taxi (you don't need so many errors to be performed before).
- Flight control check never activate the ground spoilers, but only the flight spoilers (roll function)
- Ground spoilers activation happen only with speed above 72kts, that means you have to taxi faster than 72kts
- There is indeed an active feedback through the speedbrake handle for armed position as in the Boeing (you have to pull it up). There isn't for deployed position but it's not relevant for the case.
- I have no idea why it should be done after the flight control check, but maybe because with this check your are checking the computers (ELAC, SEC) which control and monitor these conditions.