This is my thought based on WvW (1v1, roaming and blobs) :
I think at the moment it's too weak, and that you can do way better as core guard for most of the fight. The only strong point are that this spec is good for getting out of bad situation and if you engage with your F3 in big group, it SOMETIME works thanks to the aegis.
I think the "willbender flames" should be like an aoe around the character and not an fixed on the ground aoe. Something like "Zealot's Flame", it would make it usefull for pvp because right now it's useless as players are not golems.
"Flowing Resolve" would need to clean 2 conditions not just movements conditions and it would still be weak as you need 10 hits to get close to "virtue of resolve" heal and 15 hits to be above. I don't really have a solution, may be making "Permeating Wrath" trait applied to all virtues (without the burn stack just the 3 hits to gain the effect).
I think just that would make huge difference.
After that I would also hope this :
"Executioner's Calling" would be way better if it wasn't a 2 step skill, we all know that skills with 2 animation aren't that great for pvp. It's like the first strike say "be carefull big damage incoming" to your enemy.
"Crashing Courage" with a little more range even 150 I would take it! For me it's my go in skill as "Flowing Resolve" would be my get out one. And the problem is that a lot of time I have to use it than press another movement skill to close the remaining gap. If not you are probably dead by the time you get your enemy in range of it. Also may be 10sec (in wvw) less cooldown would be cool.
And that's all! I still like the ideas of this spec and wish to see it at least decent for pvp to having fun with it. Good luck to the devs and I hope to see good changes.