Announce the dates of TwitchCon prior to the end of 2023
I think as it stands, the announcement of dates in February is very short notice, particularly for those who work and need to get time off. By the time February comes around and the dates are usually announced - it's extremely difficult to get time off, particularly in July throughout the summer holidays.
I would even consider moving Twitchcon to June. With the age limit for the event being 16+ having it during the school holidays results in increased costs, difficulty in getting time off and a much busier area around the venue. A month earlier would still allow for good weather during the event without the inconvenience of holiday pricing and competition for hotels/flights etc.