I feel ye, for a good while I was put off by Athenas, I don't like feeling forced to remain in game for lengths of time. I mostly solo'd my way to PL, so played a lot but never felt chained to it until after PL. I've sat as PL for a long time not moving forward with Athenas Fortune.
That being said I find Athenas slightly more enjoyable these days, the introduction of cargo runs and gun powder skellies has helped a lot and I now usually just solo normal ones and join a crew for the Devils Roar variety.
I find that working on commendations is far more rewarding so do that most of my short sessions and only start an Athenas when I know id have been playing for 3 hours anyway, which is quite rare.
The problem with Athenas Fortune, is there's not really any challenge to it, its just more more more. Which is the core of the problem. If it were actually a new challenging voyage, that was pretty difficult to achieve but took less than an hour to do if done right, I would be happy with that. Reduce the number of maps to 3, 1 for each trading company but make them way harder than normal:
Gold hoarder - treasure & riddle combined: partial maps, scribbles describing islands and landmarks, badly drawn doodles. - test my knowledge of the islands i've grown to know like the back of my hand.
Merchant - stricter time limits, mixed cargo. - Again test my knowledge of sailing between islands quickly.
Skulls - maybe a boss ghost ship, or something above and beyond regular skele spawns. - test my combat prowess, maybe also with the ship.
I feel like Athenas should represent a demonstration of the skills you've gathered doing each of the trading companys tasks, not just do more of them with harder skellie spawns.
Commendations were a brilliant idea though, put a fresh wind in my sail.