As far as I can tell, these are not Skirmish Only Changes and affect the campaign as well.
The officer is unaffected, and while the sabateurs were probably pretty decent allies, it won't be a huge loss. The Royal Guard change however is really impactful as the royal guards were far and away some of the most efficient units you could spend threat on. I think it is a good change overall tho, and will bring them more in line with the new 8 cost cards coming in.
I also agree that a pod option should be made available. Errata's of this magnitude are somewhat unprecedented (from FFG anyway).