Looks like no auto-tune and post-production here. In my experience, Dreamcatcher is the only Kpop group who always does this (Mamamoo does it about half the time). Great respect--it's so much more authentic this way. In my opinion lip syncing is inexcusable.
and why exactly is lip syncing inexcusable? are you the one performing this hard choreography while keeping the vocals? like sometimes it really isn't that deep and sometimes its best to just save their voices.... but apparently user chrisbrengel from youtube finds it inexcusable