Isn’t glory all sbmm by rank? So if you are a legend and reset back to 0 you’ll be facing the low bracket of players, which is really unfair to them, as with rank based matchmaking you expect to be playing people of similar skill, and that’s too big of a disparity. Better solution may be to extend glory past legend, with a substantial gap between legend 1, 2, 3... and each time you reach one you get a shard and a pinnacle piece. Or a “champions” or “masters” rank after legend where it continues infinitely upward and you can get pinnacle rewards and mats.