Added 11 minutes later
Regarding the changes: as mentioned above, poker and drinks should be in a separate room during the games. By the way, I wouldn't say it was bad; the conference hall was ventilated, and mountains of bottles didn't obscure the laptops.
I would add more contests besides Heroes. On the first day, there was a poker tournament, followed by a brain ring for an hour, and then shashlik (Long live Dust!). Ideally, in my opinion, a couple more evenings should be dedicated to similar activities.