Honestly not a ton has closed in the last year, attraction-wise, so it's easy to read about the closures on paper and say, "That's not so much" ... The most popular rides are all still open, Toy Story, Aerosmith, ToT, Star Tours... most of the shows and minor attractions are as well.
But it's difficult to visualize the fact that half the park's land mass is still closed until you walk in and look it in the face. The park FEELS much smaller/and more closed off right now because literally the entire rear half is behind construction walls. There wasn't much back there aside from the Lights Motor Action Show, restaurants and gift shops... But it's still a large hunk of land mass and themepark, and cutting it out makes the park feel noticeably small.
Like... as a point of comparison, imagine Epcot closed World Showcase for a couple years. Leaving only Future World open. Sure, the only rides you lose on paper are Three Caballeros and Frozen, but there's way more to that half of the park than just the two rides... even if just more things to look at, more space to divert crowds and walk around, and more places to eat and drink.
Point is, to sum up... yeah, it doesn't sound like much on paper, and attraction-wise it isn't... but the park does feel much smaller and more closed off in-person. It kinda doesn't set into your mind until you get there and hit construction wall after construction wall, haha.
