It's pretty simply to understand, and blatantly obvious to anyone who spends even a tenth of second intelligently examining the current pools: There's a mix of powers, some more desirable than others as well as mix of powers between pools that requires the player to make intelligent choices of his limited power and power pool choices.
You've essentially created Epic level pools and proposed making them available as a normal power pool.
Seen by the min-maxers as "bad, a waste, a power tax" isn't the same as a power actually being "bad, a waste, a power tax". Min-maxers generally don't care for intelligent game design.