Didn't want to add anything to posts like the one I replied to abovr but seems some of you are mad at me that I think 15 minutes is too much.
Your situation might differ but my scenario: have to fight arena, anywhere from 15 to 20 minutes or more if I'm holding off a sniper. Around the same time for fleet. My guild does raids regularly, around 5 in a week apart from a bonus one every other time. 30 to 60 minutes for that. That's an hour to 2 hours 5 days a week. Then heists, events etc.
Now, to go back to my OP, new territory battles are coming in. Most likely, it'll be a time sink too. If it is, GW in its present form is not something I'll be looking forward to. Like I said, it's become stale. 8 nodes which everyone can breeze through, 9 or more for some with broken nodes 11 and 12, 2 to 4 hard nodes at the most depending on aforementioned broken nodes.
For someone still not getting the point, remember how everyone clapped because the boring and easily doable challenges got simmable? GW is that for me, easily doable and boring. 15 minutes? Yes, so were the challenges.