There's going to be so much customisability in Yooka-Laylee. Yooka can eat objects and take on their properties, for example a rock to make him heavier and harder, which will affect all the duo's moves. E.g. the 'ground pound' will be stronger and the 'feathery flap' shorter whilst in 'rock mode'.
Not only will the moves be affected by Yooka's absoption abilities, but drinking 'Play Tonics' will also change how far you can fly, how hard you hit etc.
Combining all these options sounds like a logistical nightmare. I wonder how Playtonic will pull it off.
(P.S. on top of customising moves, you learn new moves in any order you want and have flexibility in whether to expand old worlds or open new ones. Yooka-Laylee will offer one of the most customisable experiences in all of gaming, it sounds like).