I've seen the airship beacons in the DDO store, but I'm never likely to fork out for one because they'd just burn away my TP in no time. I'd rather spend them on something more permanent.
I was wondering though whether you might not have as an airship amenity some sort of beacon dispenser? (I've no problem with it being gold seal only if it's a revenue issue.) The idea being that while you're on the ship you can get your buffs and pick up a beacon while you're there (exclusive, btc); perhaps it expires after a certain period of time (say 90 mins) or when you log out. Perhaps you have to use gold to buy it - doesn't matter really.
Anyway, it would be like a one-use teleport scroll that can only be used in safe areas that can take you straight back to your airship. Where you could refresh your buffs, grab a new beacon and head off back to the action. Thinking a mid-level perk.
Especially handy in places like Reaver's Refuge where the airship is so very, very far away...