One of the risks associated with a packs-off T/O is being distracted and not turning them off before going. I know, I’ve done it. OK, you’re only going to be compromised in the event of an engine failure but still...
We only do packs off if improved climb doesn’t get the TOPL up enough. As it’s normally hot’n’high to be facing that condition, I regard it as a last resort from a passenger comfort POV as well.