For starters, they still don't have multisig, so there's a serious shortcoming in terms of security.

Not the mention all the bugs and leaks they have been dealing with. Sorry, but "the best by quite a distance" really does not apply. They might have been, but not anymore.

And I guess that's a good thing, they were becoming too much of a single biggest player. It's good for Bitcoin and the whole cryptocurrency development if there is more diversity. A bit of competition is only for the better.