That is the best idea to introduce 3 levela so that maximum steemains get learn and benefit from this system.
In my opinion, it is still some what tough for newbies....They may have level 50 after completing achievemement 4 task but they may not have SP more than 150 even if they powerup their whole steem by converting the SBD's.

Moreover, Additional Rewards system to Season Superstars will surely a big thing which will keep the users motivated.

Hope everyone who wants to learn will have a good time with all the new and ongoing professors of Steemit Crytpo Academy.