Fan favorite to who? In this very thread you have a divide over it. Some who while not loving the execution preferred that Luke was de-aged and no recasting. I am more opened to it then most, but Sebastian Stan is a twitter thing.
Also you do realize they made the choice already right? I feel like what they decided to do with the end of the second season of the Mando showed how they want to handle this. How they handled TRoS and Rogue One, shows how they want to handle this. Maybe they will change their mind. But right now they clearly don't feel like doing it, and it isn't like they haven't made a crap ton of money off Star Wars recently, even as people on these very boards have complained that they just irredeemably ruined Star Wars. I'd find it so odd if it wasn't so typical of fanbases that people complain about LF not knowing what they are doing or being creatively bankrupt, and then go straight to, "but they should just do a Luke show because it will be popular". They are doing well doing different things. We have two Jedi based mini-series on the horizon, with a Sith one also on the way.
Would I love a Luke show? Yes. Do they have to do it? No, of course not. Moreover, the continued complaining about it has somehow turned the mostly joyous return of Luke Skywalker into another way to complain about LF not giving you exactly what you want. Especially as when this topic came up just last week, I told you let's see what they do. And then bam, they did something, showing how they want to handle Luke, at least right now.