Went as far as the last six pages so if these have already been suggested i apologize.
1 On the trade tab a simple filter would be handy, if for instance, you are wanting to get a hold of some horses, you just click on horses for sale (trade) and thats all that will appear saving your eyes during the scroll process, also a switch button could be handy if you want to get rid of some planks put a filter in showing only people wanting them in return (The cost) and easily see if theres anything there that takes your fancy.
2 To help getting your resources more easily balanced, maybe a green arrow up and a red arrow down next to the resource in question, to see if your flour/wheat/water etc is meeting the demands of your workyards (Basically showing if they are growing or depleting, kind of an early warning system), i don't know, was only a thought. I actually enjoy finding the sweet spot but might be handy for others, when you see whole plains of tree stumps... Its just like, hmmm, sort it out =)