Leon is also more in the mainstream of game characters than Claire Redfield, so there is that sort of bias as well.
Spiders were filler monsters in like 2 hallways, so they replaced them with the more story relevant G-Young that serves the same purpose.
I picked Leon first because I always started with him and did Claire in the second scenario because I enjoyed hers more in the original. Also if you want to boost Claire's numbers, put the "Let Me Live" alternate costume back in the game....like now. And they need to put the spiders back in. I mean, why'd they take them out?
Spiders were filler monsters in like 2 hallways, so they replaced them with the more story relevant G-Young that serves the same purpose.