It's quite simple. The issue is stacking of blades and when you increase a smaller number and a larger number even if by the same amount, the larger number gets even larger.
Let's keep the initial discussion to core trained school blades (fire blade, death blade, storm blade, etc....) and now look at Ice vs. Balance in this core boosting potential, considering the orig. + stacked enchanted version.
25% Balance Blade + 35% "Sharpened" Balance Blade= approx. 60% in core boosting power
40% Ice Blade + 50% "Sharpened" Ice Blade= approx. 90% in core boosting power
Anything I can boost you can boost higher LOL
Basically this update is making Balance (and Storm, frankly, can chime in any time here because they aren't so far off in situation...) 30% weaker than Life, Death, & Ice in core boost power. That number was previously 15%. And hasn't even yet taken into consideration Bubbles, Element. & Spirit Blades, and such. Sure, about this same number showed up whenever Item cards were used & stacked. But then a Balance wiz in PvP could at least count on the 1 per reshuffle rule.
This is essentially garbage and not an acceptable circumstance for Balance to undergo this expansion. Especially for 1v1 PvP. The discrepancy here is way too wide for KI to credibly tell people there is any semblance of "balance" in the game.
This does lead me to an offshoot question: How is the percentage of "Sharpened Blade" applied to Elemental & Spirit Blade? Each school gets an additional 45% there? Can you say MASSIVE FAIL! Uh, yeah, I can....
So what's to be done here? Because the question is not whether something should be done about it but when will it? This circumstance in Live is basically garbage. I can't abide falling even farther behind. Some simple math helps, KI...