Y'all need to learn the definitions of sequel and prequel. Miles: just because they're by the same creator doesn't make it related, which sequels and prequels are. They are related to the previous work, either taking place after (sequel) or before (prequel). Acting Lessons has no relationship at all with BaD (though they both mention the school and fraternity, AL doesn't fit in the timeline of BaD, it seems to be the genesis of the thought that became BaD). There is no canonical connection.
Tremonia: OAILT and Eternum not only take place in the same universe, they refer to each other. Though they are different genres (maybe), they are definitely related, so Eternum is a sequel. Quality has no impact on it. u4ia is definitely a sequel to LoF, as there is character overlap, and continuation of the timeline from LoF. It is NOT LoF2, but it is a sequel.