Honestly as Caster/Healer I find this pretty awful for those reasons:
. All melee DPS classes have one or more gap closer (Spineshatter dive, Dragonfire Dive, Overwhelm, Shukuchi, Shoulder Tackle) + Ninja trait that give him an higher speed and Monks Fist of Wind.
. Caster have to maintain a certain distance to be able to land efficently an hit, if someone chase them they could even be not able to cast nothing (even in Equanimity/Surecast) due to the target running behind you.
. In Wolves Den and probably in The Feast the arena will have walls that introduce a lot of LoS issue for casters (I'm not complaining about it, they have to be there) but as long as a caster would be able to freesprint could try to positionate himself rapidly and try to land a cast on a slower target.
. And most of all Weapon Throw... that skill was born to fuck up a strinting target because melee have to face the problem of a fleeing target but now that thay can heavily slower a sprinting target and sprint too, I find it totally inappropriate :/
(I already thought that ninja shouldn't have them among they pvp skill, considering Overwhelm, higher speed trait, Hyoton, Shukuchi... dear god XD )
I tried to think to a "more balanced" (in my opinion) way to adjust sprint expecially for tank where the issue up to me was harder.
Give a new PvP ability to those classes that share the cooldown with sprint but:
. Has no TP cost
. Has 40-60 sec Cooldown or Give Sprint effect for 10-15 sec
So if u want to sprint just to run away u can still use sprint, if u need to use it to move faster among enemy lines and keep attacking you can still use it.
Or even nerf sprint in pvp for all, just give it a longer cooldown, so u wont' see casters be 2/3 of the time sprinting but only when strictly needed.
Just my opinion, let me know what you think about it and what jobs do you use most.