My suggestion is to add a Hunter's call voyage to track down megalodons. This will allow players to actively find megalodons instead of getting a random encounter. A random megalodon will be spawned with this voyage using the existing spawn rates.
I, as well as many others, have over 3000 hours in the game and have never got 1 shrouded ghost to spawn. There is a commendation for finding 5 shrouded ghost - this hasn't happened in the 5 years I've been playing, it's not going to happen in the next 5 years.. At least if there is a voyage then I can spend some time actively trying to find, and hunt the shrouded ghost. It's a perfect fit for the game, and for Hunter's Call and a chance to increase the level cap/add some new rings, emissary, etc.
The voyage can perhaps include talking to a few NPCs on a couple different islands and through questioning them- asking if they've seen a big shark, they describe and help you pinpoint exactly which way the meg was heading, you sail over there, the meg spawns, you fight the big shark, raise your emissary grade, raise your hunter's call level/distinction, unlock some new cosmetics for ledger, can finally try to get shrouded ghost, and everyone's happy.
Hunter's call hasn't seen any love in 5 years and here's the chance.
