Swarm Tactics is a terrible example, because the new language clarifies the way the card already worked. You were always able to choose yourself as a target; the problem was people reading it as mandatory.
Which just goes back to the "are you at range 1 of yourself" debate. A debate that the Jan crew card demonstrates is far from settled. So either way it wasn't working the way people expected it to work, and the errata just brings it in line with what most people already thought it did.
So we're back, again, to no issue of consistency but a disagreement with what they chose to change.
It's an issue of consistency because the only reason for not making those other changes has been "no errata/FAQs for balance reasons". This is probably the main reason the a-wing gets an awkward upgrade card to reduce its point cost instead of just a straightforward point reduction. This is the reason FFG has to keep printing swarm counters instead of just making Howlrunner more expensive. Etc.
And, again, I'll be happy if this is just the first step in using errata/FAQs to fine-tune balance issues. If they just singled out this one thing for GW-style errata and ignore everything else then I have a problem with it.