Sample size were the first SC players reaching max level. Yes "play what you like" but the "fun build" gets old when you get your fun inserted backwards in WT3 or above.
I tried some variations but the way D4 plays in Dungeons most of the time, large groups sizes, not much space to move around sometimes, enemies have insane melee range, shit teleporting on top of you out of nowhere, make some builds really annoying to play. Also some classes have shitty defense options it seems.
I know, Season 1 will fix this, maybe set items, but still. What's so hard to balance 4,5 core skills.