The limiting of flexibility was what I was most concerned about when asking/suggesting the idea that it consume all available charges (up to 10 of course) and activating 2 runes at once. I was really thinking of it almost completely in terms of DS for Blood DKs for an additional/on demand DS. Youre right in that it loses something when considering the use of single rune abilities which cannot be dismissed.
When I posted I was aware that both runes coming up at the same time could lead to some issues and was unsure how exactly it would function. Im not familiar enough with rune regeneration mechanics to even consider or suggest how the regenerating 2 runes simultaneously could or should function.
Glad to see it was at least legitimate enough for some consideration and thanks again for all the modeling work youve put in.