Yes it were Silver frags, but i was refering to his comment about getting his heroes to slow to Platinum.
And yes it is a bottleneck, but like I said before, it would be boring, if you get massive amounts of the needed Items and could upgrade your heroes in days.
Sure these month heroes are all energy type, but you don´t need them on Platinum to finish the raids. Gold is enough.
My opinion to this and all similar demands is, that you need bottlenecks to keep the game fun for the patient players and to get cash out of the impatient. I don´t want to play a game which I can finish in a few weeks or month. With finishing I mean maxing out all heroes. But you can do that here, by investing money. You get up to 10 resets per Raid, which would add up to 630 maximum frags a week, which is more than enough.