So, what are the most significant things, to you, that have been closed?
To me... Hm. I have to think here.
PUSH. Loved him. But I think we'll see new droids and more in Star Wars Land, so I'm ok w this.
Some shows at EPCOT. But to me, these shows really should be changed out every 2 years. They should be seen as temporary acts, not fixed productions.
Maelstrom. But it was kind of dated. So again, although I would have rather Frozen got the Energy pavilion across from the Seas and turn it into a massive Frozen world, ditching that ride which nobody cared about instead of Maelstrom, plus giving Frozen the larger footprint it deserves, and the option to buld out a Frozen pavilion a-la Nemo/Seas style, Maelstrom going is an acceptable (but still

) quick fix given the new ride will be more popular. The theater in Norway definitely had to be repurposed, nobody watched that movie.
I'm sure there's more, but I can't think of them at the moment... so I'm not trying to artificially cut the list short to make a point. How about you? I'm not asking for a list of what's closed, I'm asking more personally, what has been closed there, that you genuinely loved in terms of rides... attractions that were materially influential in your choice to go to Disney World, which are not there now or replaced by something better. For example, LMA closing is true, but I never really considered it a draw. The theater was pretty empty when I saw it in 2010, and we never went to it again. I'd RATHER this be torn out and rebuilt into Star Wars because it was wasted space to me, before.