@Niara
Anyone who remembers the old Infinity Engine games can attest that it certainly did not take hours or days to roll a character with a stat sum of 87 or 88. One could probably get a 90 without that much trouble. Getting higher than that usually required some class restrictions and racial bonuses on stats, but it was possible. Getting above 100 would be ridiculous, though.
But consider that a sum of 90 means an average of 15. That's rather nuts already, but there would probably be some way to adjust the rolled dice values to fit with the chosen class. The IE games let one simply readjust the results, meaning one could take an unnecessary 3 points out of int and put them into dex instead, if that was what one felt the character needed.
Now consider what this does to the variance of how powerful newly created characters are. If Larian is using our EA gameplay data for balancing purposes then that variance would make it a fair bit harder to draw strong conclusions. I mean, obviously a warlock is going to be potentially strong, but imagine a lucky roll of 18 cha, with a natural +2 racial bonus on top of that. That's 20 off the bat and the ASI at level 4 can then be spent on a feat like moderately armoured. Or one go shield dwarf for medium armour right away and then use the ASI to get 20 cha. Either way we have a neat 19 AC warlock with a maxed out attack only a handful of hours into EA. Surely this is just a tiny bit stronger, all things considered, than the current EA warlocks that either get armour or 18 cha at level 4.