DreamChaser
Explorer
I believe the replacement option was intended less for balance and more to keep down the volume of resources each player would need to manage.
Especially at high levels when there are 15+ class powers, 8+ magical item powers, class features, and paragon features, there is potentially tons to keep track of if the number of class powers goes up to high...
Of course, that said we'd be talking about 13 encounter / daily, + 2 paragon + 6 utility + 1 epic + 2 at will (24 total)...almost 10 more powers to manage. For some, no problem, for others, more trouble than its worth.
DC
Especially at high levels when there are 15+ class powers, 8+ magical item powers, class features, and paragon features, there is potentially tons to keep track of if the number of class powers goes up to high...
Of course, that said we'd be talking about 13 encounter / daily, + 2 paragon + 6 utility + 1 epic + 2 at will (24 total)...almost 10 more powers to manage. For some, no problem, for others, more trouble than its worth.
DC