Just for anyone who'd like some confirmation of this. Their official Twitter account it's also saying the same[1]

I'm glad they listened to the feedback but their attitude towards people who wrote in with bugs/criticism should also be learned from. Being told 'We know what's best for you, we're not reverting the changes' was pretty insulting.

[1] https://mobile.twitter.com/SlackHQ/status/119764013617293721...