When auto upgrade was first implemented there were a number of threads made to complain about it. I was there defending it, thinking it was more efficient and helped you build in an optimized way while keeping your list of buildings clean and decreasing micro. Then the Yor came and I started paying more attention to production. Before, I never really did much micro. I set up my planets, queued up some buildings and let them run. With the Yor I started to pay attention to my manufacturing numbers and with manufacturing carry-over not working, I was setting my numbers to hit the exact building cost for all my buildings. Suddenly I say how fast you can build up your manufacturing numbers on a planet. Most buildings go through prices of 30/45/67/101/151. No single upgrade costs more than 50 manufacturing points. It is very easy to get to 45 manufacturing on a planet which would allow to skip the first level on basic buildings, and a manufacturing planet can easily reach 10x that. This means that after a planet has developed just a little bit, it is almost always possible to build the lvl 2 or lvl 3 versions of buildings in one turn.
The fact that on a planet with 450 manufacturing it takes me 5 turns to build a building that costs 151 manufacturing points is ridiculous.