It's very odd and not terribly inspiring, all the more so as a first impression of their new IM system.
Implementing a front-end system to facilitate access to accounts should (read must) be a reliable and foolproof method so that licenced users can, absolutely, access their products at any time, especially since it is now the only method of access.
To not provide adequate functionality or throughput is contrary to expectations and agreements. Best endeavours doesn't cut it, I'm afraid; simply, it is frustrating beyond belief, especially when trying to access a long awaited new release.
If this were any other commercial industry, we'd be able to invoke penalty clauses, and I should imagine IB does exactly that when they aren't receiving agreed services, but for unempowered end users, online sales regimes aren't quite so favourable.
I should imagine that their systems have been inundated, and that waiting will eventually resolve our issues, not that this is helpful or warranted.