I haven't actually 7* every character, but I have enough shards for each of them to do so. I have been saving them, but given how infrequently new characters are added to GW, and that you can only spend them 4 times a day, it would be nice to have something else to spend them on. I was thinking about getting excess shards and converting them, but grievous seems pretty meh to me, so I'm holding out hope that they'll add something else.
Unless you use crystals to refresh you get enough from a complete GW run to buy the shards. I'd just convert to shard store and check it out from time to time. I know you only get 2 shards but it's 2 shards closer to each character.
Replies
Some new content in both these places is overdue.