humble minion
Legend
Depends on taste i suppose. I get where you're coming from, but it'd depend a bit how the system worked. A barbarian with 5 Con is damn near as hamstrung as the 5 Wis cleric, for instance and a low-Dex monk is a very sad panda, but i suppose a variant of the system that allocated different numbers of dice to multiple abilities in the case of MAD classes could work.Few methods which allow for fixed rolls will result in this.
The homebrew method I use most often is adapted from a 1e method and you choose your class (but not race) before you roll. Depending on the class you choose you get a lot of dice on the prime requisite (in the case of cleric 9 dice for wisdom and drop 6). You will generally roll between 15 and 17 on that stat, occasionally 18, occasionally 14. I have never seen below a 13 and that is before race, so even then you can make it 15 pretty easy. Using this method, you always have a "Good" main stat but you won't be able to choose a dump stat. and other stats are very random. You don't get your fighter with a 8 str and 16 dex or the other fighter standing next to him that has those swapped the other way.
Regardless of the method you use, rolling is absolutely the best way to avoid dump stats and have randomized characters.
Having said that, the dice fall where they may. My first ever D&D game was 4d6 drop lowest, roll 7 times and discard the lowest result, then arrange as preferred. I rolled 11, 10, 8, 7, 7, 5, 4. Tell you what, as a keen youngster, that was deflating as hell, though my more-experienced DM was kind enough to let me throw those stats and re-roll.
Which is why I think stat generation methods will remain largely as they are in any future 6e. We allow players to pick every other aspect of their character, so why bind them to the whims of the dice for ability scores in particular? And this is especially relevant for new players, who are more likely to get discouraged if they feel underpowered at the table compared to someone who had better luck with the dice during chargen.
Though in reference to the original conversation, I agree I would love to see abilities being more relevant to classes even if they're not a prime requisite. Str in particular is wonderful for armoured frontline melee combatants and absolutely useless for anyone else. You can't even make a brutish Str-based rogue without being wildly suboptimal, given sneak attack is restricted to Dex weapons.