It's really cool having a helmet that can slot in different armor set bonuses allowing people some flexibility. We had an entire armor set for solstice in addition to the weapons why not keep the helmet. It kind has that niche feeling that artificer armor had. And can save a lot of vault space being able to cover multiple sets. And has the trade-off that you can't use it with builds that use exotic helmets. It was so nice that on my hunter I never got a t5 helmet before the end of the event this has allowed my hunter to get that extra little stat boost with my solstice set.