Saeviomagy
Adventurer
I think the actual problem is that there's no point in investing in anything other than your main attack stat.
Fundamentally, stat modifiers are so low compared with other contributing factors that over small numbers of rolls, they effectively get lost in the noise. A +3 charisma bonus to your persuasion roll is effectively meaningless - it's only going to affect your roll 15% of the time, and you typically get so few rolls that it might make a difference once every few game sessions.
Conversely your main attack stat is
a) used all the time
b) applied to other things, like spells known, damage bonus etc.
So... what's the incentive to have a +3 charisma bonus on a warrior? There's basically not one - if it wasn't written on my sheet, I probably couldn't tell that I had it just by looking at successes and failures. If I want to play a charismatic warrior, then I can safely dump charisma and roleplay one, because the mechanics associated with stats are so weak.
If you want to make other stats more important, then change the skill system outside of combat (keep the current one for grapples etc). Roll 3d6 for skill checks instead of a d20, for instance. Point out to players that their +5 strength is only affecting 25% of their combat rolls, whereas bonuses to skills would make a difference on most rolls.
Fundamentally, stat modifiers are so low compared with other contributing factors that over small numbers of rolls, they effectively get lost in the noise. A +3 charisma bonus to your persuasion roll is effectively meaningless - it's only going to affect your roll 15% of the time, and you typically get so few rolls that it might make a difference once every few game sessions.
Conversely your main attack stat is
a) used all the time
b) applied to other things, like spells known, damage bonus etc.
So... what's the incentive to have a +3 charisma bonus on a warrior? There's basically not one - if it wasn't written on my sheet, I probably couldn't tell that I had it just by looking at successes and failures. If I want to play a charismatic warrior, then I can safely dump charisma and roleplay one, because the mechanics associated with stats are so weak.
If you want to make other stats more important, then change the skill system outside of combat (keep the current one for grapples etc). Roll 3d6 for skill checks instead of a d20, for instance. Point out to players that their +5 strength is only affecting 25% of their combat rolls, whereas bonuses to skills would make a difference on most rolls.