I assume that you already paid a change fee when you moved from 1 to 3 February. Would be a bot silly to pay anothe one. I doubt that AF would bulge as this is a legal connection.
Frankly, it is a safe one if you do a bit of research and know where to catch the bus. Personally, I would prefer a taxi to save a few minutes, but it is sometimes difficult to meet the taxi. If you are lucky, your bags quickly delivered, the bus just shows up when you arrive, you can make it with plenty of time.