The headers for every age on the market screen makes scrolling worse; can't see all of colonial and industrial in the same screenshot for example. If you want to trade between ages you need to be able to see between ages, and previously you could get 2 full sets of 5 lines (4 ages) visible on the screen.
All that needs to happen is make the market screen taller by the same space the headers added, so that we can still see all of one age, with it's next and previous age on the screen at the same time, without scrolling.