I just logged in to see what it says. It now says 'change reservation' instead of modify. Each section is separate still with 'special offers' , etc. Mine is update to 'call' on a few things like travel party size and dates, maybe because I'm to close to checking in.If you hit modify, and then decide you don't really want to modify based on what you see, can you just stop without changing anything in your reservation?
The dates last year were not 'call' only as I am seeing now. But again I may be to close to check in. Maybe someone who is further away could test it to see if the travel dates have the change button next to them