Original Soarin just stays put in the entrance plaza loop, which already included Energy.
I think it's Energy, Soarin, Imagination (One Little Spark), Golden Dreams and variations of Legacy.. which is yes, a reference to Leave a Legacy, but it's the main entrance area theme most people know.
Some people say some bits are M:S but to my knowledge that's not true, they're just variations of Legacy. The Imagination Institute theme from HISTA may or may not still be in it, as well as the old Living Seas theme... Can't find a good online recording from the last year or two. Also, there's a variant which uses the EAC theme from Nemo and Friends but I don't know if that's current, was temporary, or what. I just know I've heard it at some point in time.
If they leave the Entrance loop as is (and I'm pretty sure even the one's i'm iffy on are still in it today) then the only real song that's still in the park would be Golden Dreams.
Edit! Found this which claims to be a 2017 source audio recording:
It starts with Imaginations Institute, so that's still in there.
If you don't know Epcot music well it can be hard to decipher, but anytime it goes "doodly-doo, doodly-doo, Fwomp" it's the transition theme.
So it appears to be Institute theme, One Little Spark, lotta transition theme, Soarin, Energy, full version of Legacy.
Which means a lot has been cut over the years.