I assume you're talking about this as a spell mages would just have.

My problem with this -- it eliminates the need for mages to go out and get stuff, and the exposure they take to PK (both because their wand fetching is potentially predictable, and because getting their wand may put them in a dangerous area or condition) during that time.

It eliminates the power of steal to take your wands, blindness to keep you from seeing them, stuff like grease or kotegaeshi to make it hard for you to get them in your hands, etc.

To me that's less interesting and is an example of something that's an improvement on the current system in one area, but gets wrong a bunch of things the current system gets right in too many others.