Yeps I've noticed this as well for quite a bit. Started at the beginning of EoF. Sure its true Warlocks are now (even!) friggin slower than before/other classes, at a base rate of former T3 mobility. All fine and dandy (not really it sucks), the thing is movement speed fluctuates. One moment it's okay and the next you're slow as a snail. Awfully annoying when a backpaddling dreg is way quicker than you are and you're having trouble keeping up with your teammates. Sometimes it gets so bad you're almost literally crawling 🤣 It applies to every build but non melee builds aren't as bad. Melee builds, in particular arcane needle/lightning surge/glaive builds are the worst. I've been breaking my head over it, but I've noticed lightning surge glaive melee when in heavy action and quicky swapping blocking etc tend to suffer most. When you ADS/block you get a movement penalty of 0.75x, when you strafe you get a 0.85 multiplier to movement. And those stack. T3 mobility = 5.6m/s x 0.75 x 0.85 = 3.57m/s. So my theory is, that something causes these multipliers to stick. Once they're on and the circumstances to bug out are there, you keep these multipliers, making you crawl around. Whatever it is, there's definitely something wrong.