They plainly lied. Responses take weeks and are very incomplete. They have so few people they can't possibly run a secure, stable system anymore. They don't have a plan or backing from sfdc to get back to a solid foundation.

I can't speak to competitors but I can say with certainty that Heroku is simply not an option for you anymore. Whether that means you use another PaaS or fire up an EC2 instance yourself you must move away at this point.