I'm kind of confused what the complaint here is. I've been limiting my long rests due to not wanting to miss story content, and my warlocks have been gold. We've run two of them (Wyll and another PC) in our party and they've consistently been fantastic. I've had a harder time correctly metering out my Eldrich Knight's spell slots since I've been conserving them for long rests, which I haven't taken often to prevent the world from progressing too far. I think the time mechanic that has always existed in Baldur's Gate games will continue to balance out the rest mechanic the more content that gets created.
If there is a time limit/mechanic, that would balance things out. But currently there’s no penalty to wasting time. You can long rest before every encounter without consequence.
