So "eventually OSS"? That's certainly better, especially so for some use cases (company goes under), but it isn't OSS either.

Is there any guarantee ("don't take promise from a company") the license won't be changed to something more closed some time afterwards?

Why is it necessary to wait? You've already seen the feedback, if you're going to change the license, why promise to do it later?

BSL Is also not Open Source, it is another kind of Source Available issue.

Of course you're free chose the license what is right of your business, but trying to use Open Source name in deceptive marketing is the problem.

Why not dual license with AGPL?

don't let that stop you from using it marketing though.. if you're misleading with your marketing it makes me wonder what else is not as it is claimed.