Ah fair enough, been a long time since I played D:OS1.

I think the new attributes should fulfill the following criteria;

1. Benefit all characters. For example; giving movement speed or armour, but not increasing damage of a subset of skills.
2. Be a natural fit for an archetypal character that is associated with that attribute. Rogues favoring Finesse, wizards favoring intelligence.
3. Not make each point more valuable than the last with synergies. (Crit % * Crit damage for example) The reason for this is as follows; multiple attributes are discouraged if it's optimal to focus on a single one because of synergy and multiplicative scaling, leaving us with the same kind of problem we have right now.