Perhaps increased Int could increase the number of stat points per level? (doubling per 50 levels perhaps? minimum of 1 per level, but working on a % based system with an additional setting for how many stat points you get per level)

Strength is good for melee combatants, constructors, and haulers and various other jobs, as haulers get increased capacity to carry things

but buy and large, yes, everyone favors Con for reducing incoming damage and increasing recovery rates, as well as Agility for slowly turning into the Flash