ValhallaGH
Explorer
Which game are you playing?Dexterity only covers Reflex Save, Initiative and skills.
You cannot use it for ranged attacks, nor does it increase your defense.
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Presence and Intellect are still not useful enough most of the time. I only buy them for fluff.
3e Dexterity doesn't work like that, but 2e doesn't have Presence or Intellect.
2e ability scores were one of the few ways to actually hit all your PL caps - having a 40 in all your attributes gets to the PL 10 cap for ability scores, saving throws, and gives all skills a +15 bonus (with up to 15 ranks in the skills you want to be better at). Get attack and defense up to 5 and you've got a solid all-rounder PL 10 character.
Side note for 3E: Intellect is actually worth it's points for skills. Between Expertise (almost all of them), Investigation, Technology, and Treatment, it is actually a worthwhile expenditure of power points.
Presence, not so much. Especially if you house-rule the cost of skills.