I don't mind merging Bow Shock and Sonic break, both those buttons do the same thing: placing a dot.
I don't like having too much dot on a single job, while it can help with damage variance, it also hurts the job's DPS during short phases and also became a gamble on wether you use it or not on an add.

Here's how I would personally do this:
-> Delete Bow Shock
-> Make Sonic Break work like Expiacion and dealing AoE damage+short aoe dot

-> Remove damage from Dashes

With this we're already 3 oGCDs down from what we currently have.
We also need to make Continuation more flexible and I think DT GNB will be golden.

But one problem remains, Blasting Zone tends to naturally drift.
For that there's multiple idea:
-> Have Blasting Zone on 5s CD but only available for 15s after using Gnashing Fang.

-> 2 Charges on Blasting Zone
-> We're okay with using Both in NM window: Okay as long as we remove potency on the jumps, we're still -1 oGCS, -2 if we remove Bow Shock.
-> We're not okay with both BZ in NM window: Either ties its use to Gnashing Fang / Give a reason to use it as soon as possible outside raidbuffs.