The biggest flaw in Fatejo ship is they never worked together as a team post ema, that brief understanding phase during jasfa wedding(that turned to jasrik wedding) was their only brief phase as a team. That works against any show. You need to have your leads fighting off together once in a while to keep the momentum of ship going.
Kekta n gul use this tactic. Drives their fandoms into depression and then give them a high with leads working together against the enemy, that hooks them back again.
Tell me one high point post airport drama? They couldn't give that high to audience again... too busy protecting vamp and torturing leads.