There was some progress on perks, quests and new textures in 1.4.2/1.4.3, I think - then war and peace changes 1.5.0/1.5.1 (there were also tweaks to the economy throughout that period that have improved it, other than tanneries). 1.5.2 seemed to be a bit of a 'pause' in progress with some recurring bugs and lacking any new content, but hopefully we can see a couple of perk trees fleshed out in each patch now, as well as new armours, quests, combat mechanics and further improvements to the campaign side.