I've noticed the same problem with my HO, first i was thinking is by my side (pings quite high, about 50-70 ms) but few expeditions later when enemies hit me dealing normal dmg without any delays i was sure that is some changes in skill itself (or some kind of error by server side?) It's quite annoying when you preparing, starting combat and (not always, but in most cases) must remember that one of your skill need time buffer or what worse sometimes didn't deal any dmg.

I haven't tested this yet as I am focusing on trying to test and figure out other things but here is their bug report/suggestion link if you really believe there is an issue.

https://docs.google.com/forms/d/e/1FAIpQLScGmdQB99Lgyl4Oux9QMD4vuzlYPO0uFi9QGf5g0oHhyd_k4Q/viewform

Yep getting the same - shotgun and especially shadow blade, it just runs over enemies and doesnt do any damage. Its happening only online, when i play off the game runs like a charm.

Same here with an archer - all of my AoE attack works fine, even enemy attack, - also looting
Only projectile/hit box based?? stuff is missing, like 90% or dealing damage/giving back rage with high delay

I have noticed the same, but not only ranged skills. Often my melee skills goes through a group of mobs, and doesn't do any damage at all, and it is happening more and more.

Also while playing yesterday, the game felt..odd. I had 14ms connection, but the skills just felt sluggish or desynced somehow.