I have set up my new Ultamid 2 and can confirm the following (pictures to follow later):
1. The zipper is incredibly water resistant and +1 to Dan re the garage insight. The issue the reviewer encountered was likely caused by the absence of the garage and leakage occurring around the top of the zipper only and running down inside. The zipper is a 2-way\double zipper. This garage is very easily rectified with a piece of anything I suppose with cuben tape being the ideal. I have some, so no worries there.
2. As for interior tie outs, my tent includes 2 (unlike the reviewers), one in the center of each side panel about 1 to 1.5 feet down from the apex. Anticipating the need for more when I ordered it (for a planned Bear Paw inner net, yet to be spec'd and ordered), I asked HMG to include tie outs which I could attach myself later and they sent me 6.
3. As for the absence of the buckle at the bottom of the doors to reduce strain on the zipper, the tent functions fine without it. Accepting that sustained strain over time may weaken the zipper, this would likely be a good idea. But is all add weight of course. As it is, the 2 peg tie outs at the base of the doors provide a great points for any number of connection solutions someone may want to add themselves.
Fortunately, the noted issues, to the extent they are issues, are easily addressed. HMG may want to address it themselves on future builds, but for those of us who have ordered early, they don't pose any problem that can't be fixed at home.
In general I am very pleased with the tent. It is my first mid and even with limited experience it is very easy to get a taut pitch. It appears very strong and well sewn.