Yep. Not only is HTTPS stripping still a problem, but active attackers can do all sorts of other nasty things as well, like force the user's browser to initiate plaintext HTTP requests to non-HSTS sites and then use that to steal cookies from third party domains, or achieve persistent XSS by poisoning the user's browser cache. See https://samy.pl/poisontap/ for a great example of that attack in action.