I think it was Fire who said something along the lines of, the NEW updates of Limitless and QL will separate them from each other. When previously Limitless seemed like the little brother of QL, now they can be used for different purposes.
NEW QL drills in deep and NEW Limitless we have yet to see what it turns out to be.
Previously stacking Limitless with QL was more of a temporary move. As if Limitless held the ground until you moved through all the stages of QL and then you only need to run QL ST4.
But now I think you will be able to stack NEW Limitless and NEW QL for good. And both will help in different ways.

