Note that class and weapon choice also matter. Fighters and rogues get +1 to attack rolls with specific weapons, and going for a +3 prof weapon over a +2 makes a difference, too.
I played an eladrin taclord with a 16 Str and 18 Int. I relied a lot on Commander's Strike, and waiting for combat advantage or other openings to use powers where I absolutely wanted to hit, e.g., Lead the Attack. I thought it worked well.
If I had to guess, this hurts implement users more than weapon users, since there are a lot of feats that give situational bonuses to hit for weapon users, and there is the differentation between more accurate and less accurate weapons; these do not really exist for implement powers.
I played an eladrin taclord with a 16 Str and 18 Int. I relied a lot on Commander's Strike, and waiting for combat advantage or other openings to use powers where I absolutely wanted to hit, e.g., Lead the Attack. I thought it worked well.
If I had to guess, this hurts implement users more than weapon users, since there are a lot of feats that give situational bonuses to hit for weapon users, and there is the differentation between more accurate and less accurate weapons; these do not really exist for implement powers.