Well, that was... embarrassing. :D
I realized I wasn't utilizing the new tech to its full potential on some of the jumps and falls, so I went through the entire segment and improved it further by 30 in-game frames. This also let me reduce some lag thanks to not picking up 1-up and the three unnecessary balls that were slower to skip otherwise, so now this WIP is 116 in-game frames and 64 realtime frames faster than andymac's.
It is probably still improvable by a few frames (one particular thing that stands out is the unfortunate frame of lag in the final room of 2-A), but at this point I'd like to move on.