We promised to release a beta update today in the previous dev blog, but we will unfortunately have to postpone it until the next planned update on September the 4th.
The reason why is that we are currently experimenting a lot with the controls and with how boosting should work - and we also finished the new player characters today (but need time to implement them and re-texture lances/rockets), so it makes sense to postpone the update for now.
In the meantime though, here's a video showcasing the new characters: https://youtu.be/jy2AZSHBy-M