Okay, about your first paragraph, Purple Quick Runes is only worth 20,000 Points and not 200,000 .. And about the initiative increase of the Purple Quick at that level, i think it's because the rune is only Purple rank .. I haven't maxed my quick yet and i only have them at lv10 .. Yellow or Red should give more Initiative .. But i have no idea if getting Yellow or Red Quick Rune is possible by just spending coins in Inner Gates Interface since the only place where i saw the Yellow Quick Rune available is at the Recharge or Spending Rebate which is placed on the Max Rebate of the said events ..

And for the second paragraph, we can easily say that higher ranks cannot be consumed by lower ranks, it's just like magatamas and runes .. but of course higher ranks can consume lower rank runes .. And a little advice, lock all your important runes so that, it'll be safe .. Clicking each runes fast when changing it may result to unexpected synthesizing ..

Edit : I just maxed my one Quick Rune and the max level for Purple Quick Rune is Level 11 and it only gives 202, not 220 ..

..

I haven't seen anyone getting Yellow Quick Runes yet via Eight Inner Gates interface but it is they available for quite some time now thru Recharge/Spending Rebate and that rune is always at the max rebate or second to the last .. While the Red Quick Rune, i'm not sure if we already have it here in our servers but the first time i saw that runes was in Memo's video, where it is one of the rebates for recharging 100k ingots ..