I've waited months to discuss something.
I can't see the "Alfred Qualities" in Andy Serkis. He's perhaps the less suitable actor to ever play the character.
His vibe is different.
In a film like this, they could embrace that vibe and used him for a villain. When it comes to the dark atmosphere that Batman films have, Serkis could even come off as creepy.
Looking at the featured villains here, and taking Serkis' height in the equation, he could have been Penguin.
He SHOULD have been Penguin.
Warner Brothers goes to incredible lenghts to cast against character. Sometimes they go TOO FAR (like Eisenberg), and they can't see it themselves.
In the case with Serkis, I'm not sure WB picked the actor that are the best for the character.
What if they cast with a backward logic just for the sake of it? Who knows?
A little fun parody here that might not be too far from reality:
"Serkis is a logical choice for Penguin, it's so obvious, and that's why we don't want him to play the villain"
"No-one would imagine Serkis as Alfred, so we cast him as the butler for that very reason"
Sometimes one has to wonder what's going on in their minds.