I love trading technologies with other races. I really do. However, in order to know which technology is available and what faction offers it, you have to go into the trading screen with every single faction. On a map with many factions this means a lot of clicking around and it is hard to keep track of who has what.
I propose to enhance the technology-screen to show what faction offers a technology for trading. It could be a list in a tooltipp, but I think the best way would be to show it in a special bar on the right if you select the technology - this way it would be a scrollable list and it would still work on on bigger maps with many factions.
This would really help in understanding the current technology-market. It would massively decrease the time you need to search for a trading partner if you want to buy a certain technology. It would also help with the decision what technology to research next.