^ You got about 4 things wrong at once
1- There's a few doors in the warehouse, only 1 will work
2- Can't visit Liu : have you talked to her during the day at the bank ? Does the phone hint tell you to go to her ? Are you even far enough in the route for her part to trigger ?
3- Nadya unlocks after you finish the route, then wait 7-10 days
4- Dude to MC's house : read #3
He can't increasing productivity because he himself is the bottleneck. He draws the art, and the art is the bottleneck. He tried once getting another artist but he didn't like the quality so he decided to do it himself. Thus it will always be this slow. Get over it, or leave. Simple as that. Moaning about it will do no one any good.
I understand why people are upset. I personally have found the writing to not be as good starting at the VERY disappointing Eve update. Saying that, expecting the game to go faster is idiotic because it clearly is not going to go faster. If it really matters that much then don't donate. If you don't donate then why do you care, it's a free product.
Bottleneck finishes his part 3-4 weeks before the rest. Makes sense. Bottleneck also has stuff 2+ builds ahead. Still makes sense. Progress bar shows bottleneck always ahead of everything else. Makes sense again