I feel like there is a lot of over simplifying here. I work in management in the company I work for (not upper manager, lower management put the torches down I don’t get that sweet executive pay either.) I know if one of my employees misses a deadline it causes a ripple effect, Most of my job requires my employees to do there job, until they do their job I can’t do all of my job since part of my job requires evaluating their performance and helping improve it.
Now if an employee can’t shake off a client long enough to for us to go over their performance and practice new techniques and for me to look under the hood and show them where they could pick up efficiencies at, my work is delayed, if my work is delayed my bosses work is delayed, and so and so on. There is actually a whole science to this cities use it all the time to calculate how to build roads because you can make reasonable predications that if a person even taps on their breaks this is how much time will be added to the commute of the next 100 people.
So with that in mind lets look at what major slow downs have happened that we know about as outside observers, COVID lockdowns and change of management. Anyone who has not been a part of an organization that has purchased or been purchased by another company has no idea how disruptive that is. You got two competing payroll systems, HR systems, internal tools, internal communication paths, chain of commands, logistical supply chains, ect ect ect and there is a large process to fully complete the merger on every level not just on paper and taxes. The company I work for is a fraction of the size of the full corporate chain that owns FGO and it took two years to fully fold in a smaller company we bought.
As for COVID ask your head of internal IT how much fun it was figure out in a week how to let thousands of people work from home. I promise you, they got a rant prepared.
Essentially what you have is a traffic jam which like any traffic jam takes time to clear because of the cumulative effect.
Now none of this is to say there isn’t bad management involved, in my experience most organizations are run by morons who got promoted to the level of their incompetency or until such time as the people above them are sufficiently incompotent to not get promoted so no new opening are available. Which often means the people making the real a decisions are the people who tend to not actually understand the effect of their choices.
In all likelihood its a mix of factors causing the current state not just one thing. Sadly real life is different from stories, you defeat a foe in a story and its happily ever after. You do it in real life congrats you alleviated a symptom and haven’t actually fixed the problem you may have made it suck less in the interim.
Really most likely righting the ship in this case is more a question of can FGO keep player engagement long enough for the traffic jam to ease. The answer is largely going to depend on if the customer base even wants a part 3 to the current story. I know I don’t think protag needs another journey unless they change protags I feel their story will be done with the LBs so if I wasn’t two years behind and didn’t know what to expect coming up I would probably be less enthusiastic.