You can have it on all of them or none of them but having QB and PMS for some of these heroes and not for others is just confusing to people, because they're more or less equally compelling on all of them for similar reasons.
Like, why would you remove PMS from Spectre but keep it on Faceless Void? The two heroes basically get the item for similar reasons. Maybe you end up deciding that low-level players don't leverage the benefits of small items well at their level of play (which I think is pretty presumptuous, but whatever), but that decision should be consistent across all relevant heroes. Having some of them keep them and some of them not is just going to confuse people.