Every year we are going to try new things and branch out. Last year we tried Overwatch and PUBG. We had talent that was well rehearsed in Overwatch, and PUBG was the hot new thing that everyone played, including our staff. From a statistical donation and viewer numbers standpoint, both events at their worst did as good as all of our events on average, and much better than the events we cut to bring them on board. We also tried some miscellaneous games, some did alright and some were super successful.
Yes, we are trying to take Tip of the Hats in a direction with more broader appeal, but still keep the base event centered around the idea of community. However, TotH has been leaning towards variety for a while, and will not have room to fit every single niche community on the internet. As much as we love certain aspects of the game, we do not have the time for it all. Our main focus is to continue to raise as much money as we can for Camp One Step and grow the event to the point where it can stand on it's own. Being tied down to one game, or even a specific series of games, limits the outreach of our event and our cause. That said, Team Fortress 2 will always be a part of TotH. You can fully expect TF2 to be a part of our event significantly this year.
In regards to who you're referring to as the most popular TF2 personality, I genuinely have no idea who you're talking about and I'm not going to name drop out of speculation. We are still announcing players and personalities, stay tuned!