Or a third, much more reasonable choice: EVERYONE does not have to be equally capable in all things; and that in different situations different characters in a party will (or will have the opportunity to) take the spotlight and run away with it.
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In all these cases other will (usually) contribute what help they can, but it'll be just that: help and support.
The same by-class distinctions can be made for the exploration and interaction pillars as well.
This is, of course, all assuming people are willing to stand down and let other players/characters have their time in the spotlight. But if someone's always trying to hog it by being a jack-of-all-trades, or always has to be doing something now-now-now, or has the attention span of a chicken, those are different issues the game mechanics shouldn't even be trying to fix.
Lanefan
I have to agree the middleground between AS&BMX is far more reasonable than one of the extremes.
At the same time I think the game should fix the problem that one player can build a char that is indeed a jack-of-all-trades. At least if he can perform all of those activities on the same level as a dedicated char.
And the feeling you get for shining in the spotlight is different if
a) you shine because of you own power.
b) you shine because someone else chose to not shine on purpose.
I think there is something wrong if you can only shine if someone else lets you shine.
A system that requires the DM and the players to deal with its problems? Ooh, sounds dangerous.
What system doesn't?
The only way out of that that I can see is to have a system whose problems are so ingrained that they can't be fixed by anyone without throwing out the system.
Well, you might not, but you'd be surprised how few alpha dogs there are in this world. There are many different personality types, which is why the diversity of D&D characters is critical to its sucess.
I assume your ironical tone regarding 'dangers of a system' stems from your long gaming experience. I'd like a system to be easy understandable and without adjustments playable by newbies. And I, myself, am happy if I don't have to first figure out if I have to adjust something or not.
And regarding the alpha dog numbers. I don't have to be in charge all the time but not being in charge does not mean I play a character that is several power levels behind the current alpha dog char. I just let someone else handle most of the talking/etc.
But at the end of the evening I want to be sure that my contribution was meaningful being the alpha dog or not.
My quintessence is, regardless of being the alpha dog or not, I think, most players don't want an underperforming char or being constantly outperformed (3E FTR vs. WIZ).