Most of the changes and updates are totally fine in my book. Especially the Ioun Stones which simply did too much for the pricetag.
Lore Warden changes I don't get. It clearly is a Nerf, especiall on low levels. None of its abilities and/or feats ever really cause issues. If a Lore Warden becomes game-breaking it's because of abilities of other classes or feats which might need the nerf, not the Lore Warden.
Same with Tribal Scars. Might have been too powerful on low levels but it got nuclear nerfed now and pretty much noone will want to use it anymore.
Not the right way to handle it imo. It could have been 1 extra hp per 2 hit dice instead of 6 for example.