Gst shouldn't be linked with the NGS, they shouldn't make "guild points" as a reward for gst. Otherwise, half of those "50" players gonna be gsing in belle/ba which will effect the daily points of the guild. Also, it's going to be awkward when you only pick 7 members even tho some others practiced in ba/belle too. We should just stick to our gst guilds and the rewards should stay the same. Plus, this will make less gst guilds submissions since there will be only few NGS guilds with 50 members (you can only submit one team) I doubt you will get 64 submissions. Allowing the NGS guilds to submit 2 teams at once could also be an issue, because obviously you'll have the strong team and the weak team. But it's going to be better than having one submission from each guild. You can place the first submission in the first 32 guilds brackets and the second submission in the other 32 guilds brackets.
Edit: sticking to 2 gsts ( idev and mixed) will have the same result/effects as submitting two teams in one guild for one Gst.