Does anyone want the old Flat->Percent penetration system back?
Back in S2 the penetration system used to be that Flat Penetration and Resistance Reduction applied before Percent Penetration did. Granted, this made Tanks very... well... tanky, but it was bad. Really bad. The problem is that with the way that resistance is done, the first 25 points of resistance are worth almost as much as the next 75 points. If you can get into the low numbers of resistance on an enemy, your damage skyrockets.
With Percent Pen applying first, you get a lot of penetration against tanks, but you ALSO get near True Damage against squishies, and, thanks to Irelia, we all know how powerful even a small amount of True Damage can be. If we switched to the old system, you'd have to actually invest in a ton of flat penetration to get that true damage against squishies, but you'd deal less damage to tanks. Build Percent Pen and you'll deal more damage to Tanks, but less to squishies. All that would be needed from the old system is some numbers changes. Basically, just up the Percent Pen to make tanks less unkillable, but there could be other solutions.
If we switched to the old system, we'd also have more room for item diversity. You'd need to build a lot of flat penetration to deal true damage to squishies, but, currently, there's only 1 Flat AD Pen final item, and 3 Flat AP Pen final items. There's very little variety here, and I'd like to see that widened.
There should be a strategic choice to what type of Pen you buy, just as there is in everything else in this game, but, currently, Pen is just a catch all damage boost for everyone.

