Right now, GNB has an identity issue. Tanks are supposed to be your fight initiators and frontline brawlers, but right now, GNB doesn't do that well (hell, SAM is a better frontline brawler, imo).
So some quick adjustments I had in mind to allow GNB to better fulfill that role:
- Continuation always uses the Junction Tank Bonus (no matter what you've last used Draw and Junction on). This allows the GNB to have the self sustain to frontline.
- Junctioned Cast gets replaced with Nebula, which you always have access to. This is the last needed piece to be a stable frontliner.
- Draw and Junction gets an overhaul. First, reduce the recast time to 20 seconds.
- Second, it no longer grants Powder Barrel nor one of the existing Junctions.
- Third, it can now target allies or enemies.
- Fourth, it now has a 15y draw-in effect on the target (I know, I know, that's not what the Draw is referring to in the ability name, but it still works!), so you can in theory use it to rescue allies or yoink enemies for a gank.
- Fifth, once used, it grants Junctioned with Ally (if used on an ally) or Junctioned with Enemy (if used on an enemy). Either lasts for 20 seconds.
- Junctioned with Ally changes Draw and Junction into Aurora, which will consume Junctioned with Ally upon use.
- Junctioned with Enemy changes Draw and Junction into Blasting Zone, which will consume Junctioned with Enemy upon use.
It's not much, but it would give some much needed consistency to the class, allowing it to fulfill its role as a frontline fighter, and it gives it at least 1 piece of cc outside of the LB with a draw-in. I guess the one thing worth pointing out is that you would have access to Nebula as well as one of either Blasting Zone or Aurora. I think this would be okay, though, as your Continuation can no longer get the bigger Damage Potency or the AoE Heal effect.
EDIT: If having access to Nebula + Blasting Zone/Aurora is too good (and it might be), then maybe give a third functionality to Draw and Junction: if you can target yourself, too, and if you do, you get Junction with Self, which lets you use Nebula. Kinda weird, but it could work. That said, GNB is largely considered a bottom tier class with DNC right now, and so having Nebula + one of the others off Draw and Junction could push the class into a solid performer.