I second this. The delta boards, from my perspective, make the most sense. I think if we were to adopt some wicked seasonal wearables (see: Vanity Equipables and Seasonal Rewards - #5 by notorious_BTC)
Then the hardcore players wouldn’t mind a fresh slate each season as they reap rewards from each cycle.
I believe in the beginning three boards in total makes the most sense as there aren’t many players overall, but in the future we could see high xp boards, high kinship etc. For more competitive endgame enjoyment.