Hmmmm, so someone who ends up with an unstable approach for whatever reason, let's say a wake vortex encounter, where the safest way to get out of it is to hit TOGA and climb away isn't allowed to?
Don't think much of that if it's correct.
If you're not going to permit just passing traffic info and then watch the blips merge, as would be allowed by the rules, then you are taking some form of action to ensure some (not "standard") separation over and above what is actually required, none.
Which is what I think most UK atcos do, they don't try to apply IFR/IFR criteria to IFR/VFR, but they will try to build in some separation. In busy airspace it's partly to ensure safety and partly to ensure minimum disruption ie reducing the liklehood of the IFR legitimately asking for avoiding action.