Points pool

For 6-10 and 11-15 the difference between 1rst and 2nd is 15% of the pool. Kinda steep for heads-up?

I don't think so. I played in a home tourney recently where 1st won 3 times what 2nd (where I finished) got.

15% difference is reasonable, given that the player that's had the better tourney often has earned a big chip lead by the time it gets heads up. And 2nd place is getting more than half the points of first no matter how many players there are. That's pretty close to what MTTs pay in real tournaments.