Ltfj
The pilot is not a mind reader. Telling him the runway has no connection with what direction he needs to face, it's just telling him the runway in use. The pilot does not know your traffic situation, which taxi route you require, what other traffic he might block. That's up to you, and the way you remove all doubt from the equation is by giving him a direction to face, or anything else you require.
As others have said - be decisive, be assertive, remove all doubt.