Betas are still very powerful and they're easier to mix into a good team. Betas will also give a % dec bonus in a few months, just like alphas. Untamed are more expensive to level up. Novice matches are always standard and you always have access to all splinterse. Rules will begin to change in bronze, and as you rank up into new leagues, less and less splinters will be available for each match. When you reach gold, there will always be two special rules for every match.