Just got some time to look at this! Sorry I've been slow to react; it's been very busy.
I think I might have had a poison attack in mind for the Azulean Widow at some point, but the main reason it's still there is so the player doesn't get caught by any other poisonous enemies (namely the Water Spiders in Belke Coast) without them.
Sampling in the Frozen Reach won't trigger another round with Ulfar and the Dragr after you've beaten him once.
I'll have the movement directions, journal entries, and tree exit adjusted in the 0.3.7 update!