Supplement Four said:
7, 14, 13, 15, 12, 11.
Now, we're going to arrange-to-taste and make a Soldier character. 1st level.
What's most important for a Soldier? STR (or DEX) and CON.
First, let me just agree with you that with this example I would believe that the norm would be to dump on CHA.
Second, let me say that this is a horrible example and that I wouldn't agree with most of the rest of your analysis.
2A: If I were going to pick classes to use for examples, I would pick barbarian to represent fighters, scholar to represent magic-users, and thief to represent everything else. In all likelihood, this doesn't change your primary complaint. I could easily see the 7 going in CHA for the barbarian.
2B: I'd be inclined toward assigning the stats thusly for a barbarian (or a future barbarian):
STR 15
DEX 11
CON 12
INT 14
WIS 13
CHA 7
DEX and CON are not remotely the next most important attributes. With different numbers, I wouldn't even say STR is the most important attribute. But, then, it depends upon the campaign.
In our campaign, INT is the most important attribute at the beginning of the game, though it can be ignored forever afterwards for non-scholars to jack up STR or whatever since there's little gained by INT increases after initial character creation.
DEX offers very little, being inferior to STR in almost every way. It helps with Reflex saves, which are fairly common in our campaign but not terribly deadly, and initiative. Initiative is a big randomfest of d20 variance, but it hardly matters since there's always Improved Initiative or, if Reflex saves are important, Lightning Reflexes to jack initiative. Some campaigns may find the DEX skills more important than the STR skills; ours doesn't.
CON's effect on hit points is trivial for fighters, being far more important to squishies - thieves, scholars. Massive damage saves are incredibly important, but the reality is that there isn't a lot you can do about them as it's really hard to get to the point where you can confidently survive them. Other Fortitude saves? Likely to be highly situationally dependent. I've had a character Death Touched twice in one combat, but that same character has had many more problems with Will saves ...
Meanwhile, WIS is extremely important. Failing a fear check when you are supposed to be a backbone of combattiness is a good way for a TPK. Fortunately, barbarians get Fearless and a min/maxed first level character will always have a Code of Honor, and fear checks don't tend to get too hard, and Fate Points can be burned on them, but still, so bad when failed. Failing against spells is often an efficient way to die or, in the more devastating situations, efficient way to achieve a TPK. Also, Spot has been kind of stupidly good as a skill in every d20 campaign I've played in.
At 4th level, I'd jack STR to go from +3 damage w/ 2H to +5. Actually, I'd probably just keep pumping STR to improve kill output.
Now, for a thief:
STR 7
DEX 15
CON 12
INT 14
WIS 11
CHA 13
I'd be tempted to do something like this. Eventually, Sneak Attack damage will result in autokills making STR damage bonuses irrelevant, though it would be nice to have a higher STR for various reasons, like carrying loot/bodies.
The CHA of 13 presupposes that the party consists of exactly one barbarian, one scholar, and one thief. The thief is suited to being the face of the party in such situations due to the # of skill ranks and wants a good Bluff anyway to make sure of Improved Feint kills. With another character to be social, CHA could be a dump stat and I'd be inclined to move the 13 to WIS and the 11 to STR. I suppose you could say this further supports your view that CHA is a dump stat, but *someone* in the party should be charismatic barring the "all we do is kill everything we encounter" style of adventuring, and I don't like piling the skill ranks of the scholar into social skills when there are so many knowledges to pile into.
Scholar:
STR 12
DEX 7
CON 11
INT ?
WIS ?
CHA ?
Scholars are complicated. I could see a different stat being the dump stat here, but I'd probably deal with initiative through Improved Initiative to make sure a spell goes off before the scholar sucks death. There are other reasons I might not want a low DEX, but these physical stats give the scholar a chance of doing some damage at low levels while having not awful hit points. The more barbarians the party has, the more I'd be inclined to switch STR and DEX to improve defense against ranged attacks, improve initiative, and because the barbarians are likely to be STR monsters.
Anyway, the ?'s are because it depends upon what sort of sorcery the scholar is engaged in. If the magic attack roll has to be godlike, then CHA could very well be the most important stat. I'd be inclined towards a 14 INT since 13 blows and 15 gains almost no benefit over 14 for the life of the character. WIS comes down to how important Power Points are going to be. Since scholars tend to develop a diverse batch of sorcery styles where some are MAR dependent and some aren't, CHA makes for a pretty junky dump stat.
Anyway, those would be my examples of plausible characters. I continue to not be concerned with this all-encompassing problem that S4 seems to have with the game.