Assuming --from the nature of the 4 very distinct paths-- that some APPEAR to have a clear advantage in leveling speed. FASTEST to SLOWEST Settler - Stay in one place, build <REDACTED>, defend it, level FAST Soldier - Go kill, place X, --DONE! XP Scientist - Scan lots of stuff in wierd places...lots of travel, probably multiples needed, cavernous locations --SLOW PROCESS Explore - ALL THAT TRAVELING will take FOREVER!!! Going to the most remote of places, or multiple remote places for each challenge, complications via jumping terrain, etc...I'd think when game guides (for fast leveling) come out, this may be the slow, tedious path. ...just throwing out uneducated assumptions...anyone else concerned this may happen?