I'm hoping Lea will have less a role, not only because I think his character (much like Roxas) is WAY overplayed at this point, but I also think there's going to end up being controversy with him because of the creepy shit his English VA has been doing. I imagine they're either going to ignore that stuff and keep him on, in which case I'm constantly going to be thinking about that stuff whenever I hear Lea speak, or else they'll recast him, in which case it will feel really weird. Obviously, this wouldn't affect the Japanese release, so it shouldn't have an effect on how much screen time Lea gets going forward, but these are the issues that the English localizers are going to have to contend with.
To be honest, I want most of these characters to just sit back and relax for a while. I don't want any of them to just be sidelined, and I think there's definitely stuff for each of them to do, but I also want the series to feel free and open enough to branch out and introduce a bunch of new characters. It's going to feel really silly if we enter this wide open new saga with multiverse jumping and all this crazy stuff, and yet have everything still revolve around the same core cast of characters from the last saga. I mean, I love these characters as much the next fan, but the series desperately needs a break from the Sea-Salt/Wayfinder trios being at the center of the narrative.