After they joined the film it seemed like a great idea cus Lord and Miller are great at taking seemingly lame ideas and making them work out great. Plus, their personality as filmmakers seemed well suited to Han Solo. So I was pretty optimistic for it being good.
Now they're gone again and with it any enthusiasm I had for the film. They still had 3 weeks of filming left apparently so some other director will have to come in a finish it off with loads of reshoots changing stuff and editing footage that other directors filmed for a different vision of the film. (how many stupid plotholes and generally shitty moments will this add in? Ask Rouge One.)
It'll probably still end up better than R1 cus it has a pretty solid cast, plenty of the footage already shot will still get used, and in general it seems to be aiming for a more lighthearted tone which will make it more palatable than the overly dour R1. But nonetheless it's going to be a total clusterf*ck.
If Kennedy and Kasdan had a particular vision of what the movie should be like they shouldn't have hired directors who have a completely different particular personality that they bring to everything they work on.
At least I still have episode 8 to be optimistic for. Rian Johnson seems to have gotten though that production unscathed at least. If that ends up being the last "good" Star Wars movie, well so be it I guess.