I've detected your prediction round last year around October / November and it seemed to be fun, so I'll looking forward to join.
Maybe we'll get a generous deal from Sportsbet.io once again because I can imagine we'll get quite a long list of interested participants.
Personally, I'm not very experienced on Superbru but it shouldn't be an issue most likely (if Superbru is used again) since it seemed to be a good choice for your last round.
The upcoming season will be interesting as well, hopefully we'll have Red Bull, Ferrari and Mercedes compete for World Championship. If Ferrari doesn't drop off after summer break again...
Superbru is great both for soccer pools and F1 pool,at first I did not understand well the EBP but once I got it right then I started the round with at least 3 points majority of the time by finding 1 point the pole sitter and 2 points by putting my prediction early before official qualifying started,that is why it is called Early Brew Points-EBP,if you don't do your picks before official qualifying starts you don't get those points.
I think it is time for the payments deadline to be able to collect as many of them as possible and of course some extension like 2 races grace period for many people who are new to the pool so they can see if they like it or not before joining it in a definite way,this in my opinion will bring more participants.