When it comes to casting, more often then not, I tend to trust the filmmakers judgement much more than fandoms, since , often, fandom is wrong .
Of course filmmakers get it wrong too, but filmmakers know what type of performance is needed for the script and the actor has shown them they can do .
Fans tend go on of alot of preconceived ideas of how they feel the role should be played. Or fans assume because an actor is good at playing one type of role, that they couldn't possibly play another type of role.
Hence fans will proclaim things like, " There's no way Keaton can make a good Batman", "There's no way a Blonde Bond can work!", " Gal Gadot doesn't have that many movies under her belt, so it'll never work" , or " Tobey Maguire doesn't look like Peter Parker", etc.
If it were up to fandom alone to make these decisions , alot of the actors who were iconic in the roles of heroes and villains wouldn't have ever gotten the parts.
So when it comes to this casting, I'm gonna try to keep an open mind, and give them a chance to prove themselves.