As a person who usually rerolled stats in BG1 until there were 92 or more points....I actually don't think stat rollling makes sense in a CRPG. If you can't reroll without significant effort (such as restarting from the main menu), then it's a potentially frustrating experience, if you can reroll, it's equivalent to a cheat. You might as well just use a mod or cheat program to set your attributes. And since there is no such thing as dual-classing in D&D5 with its very high attribute requirements you might not be able to get with the buy point system, rolling for stats serves no useful purpose.
