Does the secret menu on the Rip Ride Rockit still work?

From what I heard lately, no

According to family members who were there last month, it sometimes worked. My brother said he rode seven times over two days and got it to work five of those, so it may depend on which train you are in.

They have also removed/added some songs to the list. I think it is the seat that has problems and not that the songs were removed from every seat.

yea it does, used it recently, played The Doors

I had intermittent success on our trip last October. Sometimes it's a matter of how long you hold on the screen---if you let go a millisecond too soon, the timer resets. I also noticed that some of the touch screens are more sensitive than others, but as far as I know most of the "hidden" songs are still there,

Rode it 4 times and tried it each time, didn't work.