Once we get out of early access, we'll probably have rolled stats, but it should be noted that having more variance in stats does not make it easier for Larian to balance the game, so while they're tuning their encounter design, it really does make sense that they're limiting the stat variance by only letting us have point buy.
@ Niara
Notice that Ragnarok rolled 6d20, not 4d6 drop lowest per stat. As for past experience, you really should try BG2. It isn't hard to roll good stats. I suspect it just did a standard random between 3 and 18, added bonuses and penalties, and then raised to minimum for character class. And then players could move points between stats one to one.
Regarding the benefit of extreme stats, if one can start at a full 20 in the key stats then that means taking more feats or taking feats earlier. This is not entirely without impact.
@ KingTiki
I don't think Larian should try to promote purism by only letting achievements be earned if playing ironman with core rules using pointbuy. That's not sending a good signal of "just have fun", is it? And for MP purposes I'm not seeing a problem either. This is not looking much like an MMO PvP game, after all. Unless I'm missing something?