Port in a storm is a GREAT move. One of my players uses it all the time to arrange a fictionally justified NPC to give him what he needs narratively (either as player authoring on the direction of the story or to secure a fictional macguffin to achieve the party's goals).
It takes its cues straight from Burning Wheel's Circles mechanic and allows the players to invest in NPCs. I insist they suggest a bond with the introduced character too. The non Bard players may always take this move (from another playbook advance) but I also allow a defy danger move based on CHA to do exactly the same effect on a 10+. 7-9 causes complications (often an enmity clause). A miss is a hard move, usually meaning the NPC is not only an enemy of the PC, but has arranged for a little welcoming 'gift' to greet them....
In regards to Arcane Music, like with all moves, you need to do it to do it. So the fiction always comes first. +1 Forward is just that (to the next roll only) so if the player wishes to replicate the mechanical effect, they have to make the move again, perhaps fictionally justifying it by playing a very long epic ballad or somesuch. On that note, I've made the damage bonus +1damage dice. I don't think there is any need for a -1 ongoing penalty on a 7-9.
Though I often take cues from basic moves and put the player in a difficult spot or determine that the unwanted attention is from another PC (not the target of the Music), break strings on their lute or whatever. Fictionally embed the consequences, make the move snowball.