RE the BUG menace: going through some >3-4 year old decklists, I found some that sided 2 Spiritual Focus. Could this be some tech to helm improve the matchup against Hymn-Lili decks?

On the draw it won't stop a turn 2 Hymn, but it's very good against Liliana, and even not that bad against Leovold in case they have both online - as 99% of discard is sorcery speed, allowing us to still draw 1 extra card that turn.

Then again it does nothing if your opponent chooses not to play their Hymn and BS-shuffle it back, I guess that's still okay but it may just be sitting there on the battlefield doing nothing many games - or be an abysmal topdeck if they already T1 Thoughtseize T2 Hymned you.