FireLance
Legend
Frankly, I think this should have been a design principle from Day One. It would have made some people happier about the concept of "forgetting" old powers.Nice, short and to the point. I like how the encounter powers were scaled such that when you replace a power you could replace it with a power that is basically a scaled up version of the same power.
EDIT: Or maybe just have a rule that you could "upgrade" an old power to a higher-level version that simply dealt +1[W] or +1d6 extra damage.