> they can apply on a per-post granularity as well as a per-account granularity

I might want my verification to apply on a per-post granularity. For example: if I'm speaking on behalf of my employer, then my post should reflect that, whereas my usual shitposting and pet projects probably should not reflect that. Currently the only solution there is to have entirely separate accounts (which might not be unreasonable even with post-level verification, but still).

I'm also left wondering about the temporal aspects of verification. My employer might verify me as one of their employees now, but not necessarily a year from now. Per-post verification would reflect that I was authorized to speak on my employer's behalf at the time I made posts to that effect, without retroactively implying that for posts I made before I worked for that employer, and without that verification needing revoked for those posts after I stop working for that employer.

This is all admittedly a long ways off from what Bluesky probably intends with its new verification feature, but I guess what I'm getting at is that if labels can already do per-account and per-post granularity then having a second kind of label that's only per-account and doesn't offer anything that normal labels can't already do doesn't seem all that valuable.

> you can lose your blue check if you change your handle or display name, but labels stay the same no matter what.

That seems reasonable (but IMO questionably necessary) for handle changes, but rather unreasonable for display name changes.