Initially, yes, but I'd like to point that Mab doesn't strongarm parties into joining the Accords at the modern day, and yet, canonically, people like Marcone elect to join on their own.Mab pretty much forced/strong armed them to do that. If we wanted to arrange that sort of thing we'd need to take the role of Mab and force people to sign them.
So, how do you address the issue of the exalted? Right now, the situation is:To expand a bit on why I think this is a bad idea:
When approaching this kind of situation you need to consider who's involved, how they know each other, the social inertia of their relationships, and the context they're informed in. You need to understand what they want, what they have, and how they prefer to bridge the gap. The more people are involved the harder this is to manage.
The problem here is multifaceted. Many of these parties are very alien to us and to each other, making their decisions more difficult to predict. Almost all of them hate at least a few of the others and are very comfortable using violence to express their opinions. At least a few have a remarkable tolerance for incredibly risky plans and a strong desire to destroy what little system there is to rule over the ashes.
The Red Court and the Fomor work with outsiders to target Winter and the Accorded Powers just to name two examples. Creating an international framework will involve handing information and access to people who will abuse it.
So what I think will happen is that getting them to do anything helpful collectively will be exceedingly difficult. If they do anything at all it's more likely to be a costly hindrance than anything else. Either very wyld hunt in nature or something annoying like "yes we should place limits on the exalted, starting with the one in front of us".
Anything we do make will immediately be full of people looking to take everything they can get for themselves, at least two factions of which have the express goal of killing everyone else involved and are willing to cheat in every way that they can physically manage because victory absolves them of consequences.
1) At least some parties (Odin) are looking for exaltations, almost certainly with the purpose of making their own loyal exalts. At least some parties have a high chance of making it work.
2) At least some parties are capable of producing exalted akuma, as proven by the two held in Demonreach
3) Statistically, a new exalt is likely to be almost completely ignorant or to have a very warped view of supernatural world - its politics, laws and Laws, and underlying building blocks.
4) Killing an exalt is likely to result in an immediate appearance of a new exalt. Containing the shards is possible, but tricky, especially mid-combat
First two of my points mean that there is already an arms race in regards to producing your own exalts. The third point means that new exalt are both vulnerable to being grabbed by various factions, and may be ignorant enough to be a danger to the world. Shanking Archive with a spirit killer, calling the Calibration Gate to the Outside, raising a corpse of a dead god (or just tapping a large oil field with the same charm), or somehow breaking the world in some other way.
These are the issues that need addressing. As far as I can see the most constructive approach would be to ensure that all new exalts are quickly found, assessed in regards to being actively malicious towards Creation, and given some manner of comprehensive education in regards to supernatural world. The political powers should be kept away as the ignorant exalt acclimates.
Wyld Hunt is harder to organize than this, I feel.