Progression feeling
For now the only existing progression system is to do some challenges to earn rip chips to open random boxes to get some gear we do not necessarily want, but something kinda chocked when I first played the game a few months ago, our character knows every single trick in all four stances better than any pro skater do in a lifetime of skateboarding, and it makes switch fakie and nollie pretty pointless.
So I think a trick mastery system could be nice in this game and make the practice and dedication to the game a bit more rewarding than just wiggling the stick around randomly (nothing inappropriate here), our character could start with the basic tricks only (kick/heelflip, front/back shovit, front/back 180) and the more we do a given trick the more comfortable we get with it, and for example once our character is experienced enough with kickflip and front shov, hardflips are getting easier to do and the more hardlips are done the easier the 360 hardflips are until we're finally able to do that crazy nollie 720 triple laserflip over 25 stairs
it doesn't have to be a long and tedious journey, but it could give us a stronger progression feeling and also to develop our personal skateboarding style (like in real life I've never like heelflip and never been able to do one clean)