I think the issue here is that its not the fact that the director told us Landos pansexual, but that the director felt the need to tell us that Landos pansexual (also one director saying Landos pansexual does not mean he is canonically). You will find most SW fans arent upset about more diverse themes being brought into SW, but they are upset that these themes are becoming the forefront of what Star Wars is. I for one would have preferred a slight nod that he could be pansexual instead of a director having to tell us this in an interview.
Anyway, back onto the topic at hand. I admit I did enjoy Solo. Its the first movie from Disney I thoroughly enjoyed. It took a while to get past the fact that Han was not played by Harrison ford, but besides that, it was fun to watch