I love the fact that the "Buy/Sell" resource buttons have been added to the main interface screen. If I'm in the middle of building structures or ships or making planet upgrades and I don't have enough of resource X, I can hit a few buttons and I'm all set.
However, if you're on the research screen, and you need more of resource X, you need to close the research screen, hit the buy/sell buttons to get enough of resource X, and then go back into the Research screen to purchase the research. I can't imagine that it would be that difficult to add the Buy/Sell resource buttons to the research screen to save some clicking.
Thanks!