I think the reason to no more track is simple: No more tracks needed. TM2 seems not to have any so called tricks etc and the shortest driving line is almost always the fastest one. In bay, snow, desert & island you have to get speed with a wider line and turn as smooth as possible, in stadium you need to force the drift (that wasn't planned for stadium), in coast you have to play with the gears and risky grass touches to get grip and in rally you need to try wide line without slipping out of the dirt road etc etc. On Canyon the driving is simpler what comes to car and grip; you don't need grip and the shortest line is the best, in most cases. Of course there is the "to slide or not to slide" factor and driving on two wheels close the down & uphills ^^