The regular Skyrim Legendary Patch fixed it so if Alva was killed while Hostile, Lami and Hroggar's relationship to the player would reset to 0 instead of -2.
Unfortunately, I tested that in Special Edition, quest ended with both at -2 friendship with me, even though Alva was killed after going hostile in her house.
According to the USSEP patch notes, it says that was fixed, but I could not find the fix when I examined the Special Edition version patch in the Creation Kit, values for those settings appeared unchanged, and I had no mods that conflicted with those quest changes active when Laid to Rest was done.
For reference, this was the report for the Legendary patch:
Issue #19404