I think that's pretty high compared to the average. I just received my 8th yesterday, having applied the enchant the day it was released. I've gotten a decent amount of containers; I'd say roughly on-par with when I ran Bloodhunter. While I think the per-container drop chance should remain the same, having a chance to get two would be nice. Maybe it's already like that and I just haven't seen it? Anyways, I'm at 8 and all but one recipe thus far; I think that's somewhat average, maybe a bit below average.
I'm just upset that by the time I'd obtained enough to make a pair of goggles, the price had dropped so dramatically that it's really only worth selling the glass directly at this point! Here's hoping they add more recipes for the material; it really reminds me of Jard's or something, just with a more interesting method of obtainment; even if it's just one high-cost craftable like a mount, I feel like there should be alternatives to the goggles. I'm sure that over time we'll get something. I miss the days of rare Engineering schematics from raid bosses.