As someone that cares about LD, Corridors, and the NEC, and felt like the volume of posts wasn't particularly overwhelming, I'm also finding that this change means I'm just reading three forums instead of one.
Amtrak is also the largest forum on the site. Currently 8741 Topics 248683 Posts. Next largest forum 6198 Topics 158366 Posts.
No, I am not saying the New Jersey Transit NJT Rail and Light Rail LRT forum needs to be split.
(As previously stated, I could go either way with the Amtrak split.)