Would it be possible for Louis or at least Gabriel and Noah to be reinstated into the line of succession?
Given the recent behaviour of their mom that is about the last thing the LRF would want - that Tessy suddenly is the mom to the heir. Can you imagine the ME * ME * ME stories?
If Gui and Steph remain childless, there is Felix and subsequently Amalia and Liam (I am not sure if Felix could declare on their behalf they are not taking over). There is still Sebastien and Alexandra. I am sure there are other possibilities than allowing Tessy back in an influencal role.