It seems players’ inventory woes related to the new crests and fragments will be here a while. Blizzard has responded to concerns over inventory clutter caused by the new Season 2 upgrade system, and we may be seeing the materials head to the currency tab… in Season 3. Maybe.
Crests (Source)
The existing crest and fragment arrangement certainly contributes to inventory management concerns. While I can’t promise anything at this early stage, moving crests to the Currency tab is under serious consideration and I think it’s more likely to happen than not for next season. Additionally, having players capped on a given tier of crest getting the next tier down as fallback rewards is under discussion.
And yes, I did implicitly reveal that our current tentative plans are that this system will be iterated on for Season Three.