Agreed. I prefer to refrain from commenting when all we have is theory and incomplete sets of numbers, but that's my speculation as well: changes in the right direction but too small to move many needles.
- T3 buildings and Food Markets are less terrible, but still inferior to pretty much any alternative. They aren't sexy capstones at all.
- Specialists are only improved in the endgame, and only marginally. Their yields would still be considered relatively poor on a tile, especially Stock Exchange.
- Workshop and Bank are still very lackluster buildings.
- Canada is probably not in a garbage tier of their own anymore, yet is probably in the running for worst civ. The diplomacy changes probably hurt as much as help their ultra-late-game diplo advantage.
- The England changes seem to be doubling down on the existing anti-synergistic mechanics--weird late-game advantages on a colonial civ?
But we're looking at a sizeable number of changes that are all in the right direction in the right places, and there are lots of dynamics that could change with these radical production and research cost tweeks. I suggest we play it before speculating
too much.
Edit:
From Anton's graph we can see that Airport (600p) and Stadium/AquaCenter (660p) have been reduced to ~575p, and that the Hydroelectric Dam (580p) got reduced alongside the other T3 buildings. That's quite nice.
Edit 2:
It's worth pointing out that the cost reduction of T3 buildings is slightly compounded, because the cost of power buildings are cheaper as well.