1) Really? Never noticed that.
2) Meh, I dun run dem, I dun care XD
3) Solemn Warning has many advantages over BTH. If you BTH a Hyunlei, for example, Hyunlei still gets the effect, since it's a Trigger effect. But if you Warning it, there is no effect, because it never hit the field (it went from Limbo to the grave, if you don't know what Limbo means, go look it up on Yugioh Wikia). And BTW, also remember the rule that you can't Reborn Synchros if they got Warning'd, cuz they weren't summoned properly, while you can easily use Return of the Different Dimension or something like that to get back your banished Synchro (since that wasn't negated, it counts as a proper summon).
Another thing is that BTH doesn't kill Zenmaines, but Warning does.
That 2000 LP loss isn't that bad, honestly; if you play your cards right, you should still be able to win, despite that defecit.