Cheers Alex - have purchased & printing now!
My setting (FR Damara 1359 DR) is a feudal kingdom with powerful regional nobles and a relatively weak centre. The various PC realms are currently at manorial/sub-Baronial level, but at least two groups are looking to establish Baronies. I hope to run the setting for many years so should be getting into high politics etc over time; relations with the local Ducal Court are already important.
I've gone over it now - I like the revised domain size and morale/loyalty system a lot and will likely be using it, along with a lot of the other stuff, in my 5e game. I think the 75% economic extraction looks too high, so I'm keeping the baseline production numbers based off 1 sp/person/day subsistence (which I already use), but halving income (& required expenditures) so income of 1gp/family/month becomes 1 sp/person/month. My own maps are 2 mile & 10 mile hexes rather than 1.5 and 6 mile, but it looks like 10 2 mile hexes is pretty much equal to 1 6 mile hex so planning to use that for conversion.