This resonates with me, and is definitely why I loved Screenhero so much, it felt VERY fast, and visually looked crisp. Even the initial connection speed was fast, while Slack takes about 3–8 seconds to connect. And also why I was so disappointed with Slack's product, now it's back to the same level as Google Hangouts.
It's surprising that having the same lead, and access to the same source code, that the product was unable to achieve the same level of quality & performance. What would you say the culprit is? And if I may lead the question... Bureaucracy inside Slack? Managing a new team? Having to rewrite on presumably a new language & software stack? Rushing to meet deadlines?
Anyways, awesome to see your back at it again, and that you have such care about latency, people do notice & care!