All the tracks released so far had the Reverse and Trick variants, so we can expect those, it's the Reverse/Trick variant that is not always released.
As for the friend Coin, it's more a feature to ping the other friends to show them that you're alive and also to see who replies to know if and when they login. It has hardly any real value but it's useful to stay in touch and to see who you can rely on when organizing friendly races without any prior notice, for example.
As for the friend Coin, it's more a feature to ping the other friends to show them that you're alive and also to see who replies to know if and when they login. It has hardly any real value but it's useful to stay in touch and to see who you can rely on when organizing friendly races without any prior notice, for example.