As I understand it, the AF Orly operations are slot sitting until Transavia has received enough aircraft to take over the slots and fly them to wherever it wants. One has to presume that Southampton, Cardiff and East Midlands won't be especially high on their list, but who knows. The arrangement with Eastern is a marriage of inconvenience for a limited period.
The smallest aircraft in the AF Hop fleet is the Embraer 170 - happy to stand corrected but I believe those are mostly in the regions and the smallest aircraft at CDG is the 100-seat E190. That's a relatively high bar for capacity for any new route to a regional airport. Again, not to say that it won't happen, but I'd not be rushing to the bookies to lay bets on it any time soon.