Well, your average lord couldn’t do a lot of what I was proposing – canals that unite entire kingdoms, significant changes in the law, etc. And keep in mind, I framed my ideas as being on the very edge of the possible.
But on a smaller scale, yes, some of these things could be done and some of them would see results in a few years. Others would take decades if not generations.
But hey, the Eyrie wasn’t built in a day.