It was up at 6am sharp when I made mine a few weeks ago.
I have very few problems getting what I wanted at 180 days. Got Le Cell, CM, Ohana, etc all with no problem. I only had trouble booking Tonys. I couldn't get in on our arrival night, so I swapped it with our Chef Mickey's night. No big deal in the grand scheme of things. The only reservation that I couldn't get within a half hour of the requested time was Crystal Palace dinner...it was 45 mins on either side that I was offered. Still 6:45 isn't a bad meal time. I was done by 6:30am and back in bed. I even went back on at 930 after my "nap" and made a CRT breakfast reservation and had a choice of times even very early in my trip.
I even tweaked things and flip flopped some of our days to work better with hours, EMH's, and Spectro/Wishes this afternoon. No problems at all getting what I wanted and within 15 mins of what I requested.
You should be fine at 180. Just prioritize what is most important to you and make those first.