I mean if the bench is going to shoot/score like it did yesterday, then no, but I think McBuckets gives you another elite shooter and excellent scorer to give that bench a real scoring punch. For most of the year, if Monk was off, we'd get nothing from the bench. And his built in chemistry with Domas, you'd have another option in the 2-man game with him.
In terms of a playoff rotation too, I think Lyles would fill the back-up 4/5, McBuckets the back-up 3/4 and the Davion/Monk the 1-2.