I've got mine working again by setting the upper limit of the door rotor to slightly above 90° (90.44 in my case) and it has worked very time.
The reason for this is that the tolerances for a successfull merge have gotten smaller. So even a small gap will cause them not to merge. The rotor now tries to push the merge blocks 'into' each other making hitting the tolerance a lot easier.

I believe the problem with the doors is the merge block the locks into the door to bring it up but not sure how to fix that

Note to all: I stopped playing the game, sadly, so it is not to be expected that I can find a short term fix for the problem. I wish I had better news to share, but after a good 750+ hours of SE I am done with the game I think.

I have no idea what Keen broke this time around that made the doors no longer work, but it appears to be a very fundamental change again that may not unlikely demand a fully different design. It appears to be not easy to fix.

Hmm doesnt work for me... the left side just hit the ceiling when the arm on the right side pull the gates up

@Master Obelawe
Just copy paste it. It's easy. The idea is to place the rotor in the right place and to put the rotor at -10 cm's, give or take. That's it. The rest can be automated by means of timer blocks.

You can simply copy my timer block sequence, if you want to do it lazy mode ; ).

@Parabellum super awesome design any chance to make installation video, please

Idea: You could make a Escape pod system using a door style like this and possibly put it on a ship

@Spaceman Spiff

That's the thing: the door tends to be much bigger than the ship itself, at least if you don't want to make docking a chore. As a rule of thumb I like to have 4 blocks of clearance above and below, as well as 4 blocks left and right. In this case a ship that is max 7 high (whih is rather low for a large grid ship) and 26 wide (not that wide either) could pass.

Or you just park two ships in there ;).

The 50 x 18 doors however, that's another subject altogether haha.

Very impressive; smooth operation. I can't imagine building another ship so large that I would use this massive of a door (I did once; never again).