I think we've all gotten used to the softer tourism ,but those days are ebbing away. As I am calling now for our trip at the 90 days mark, I am finding I can't get some of my preferred time slots already! And the CMs did tell me that one of the more popular places is Chef M's. Now that said, I should note that it also depends upon your party size. I think a twosome or even foursome stand a fair chance of a table -- or at least certainly better than larger parties (we have a family of five... and often travel with MORE family, making us sometimes a party of 8, 9, or 13!)
I think I would make a call just to see what's open. No harm in doing this, and it lets you know in the here and now if you need to develop a "Plan B" just in case you can't get in.