Of course, we won't have unanimity on who would be the ideal actor or good options, but I believe that appearance is an important part of the character's characterization; after all, he isn't LeBeau for nothing, right?
Certainly, the script is the most important aspect, and it is essential to have a Gambit that aligns with his personality and abilities, which made us love the character. However, his appearance is also part of that. I think this kind of choice reflects respect for the character and how he was created to be.
We are lacking in this regard, considering what we've received over the years, and I don't think we should have to choose (not that we really have a choice, since we aren't the producers) between getting just the script right or just the appearance. As fans, we want the complete package!