@Telin, lets break down all the ways that Wrapper is a waste of word count - as written.
If you want to change the way an Icon looks, use Change Icon.
The only reason to do otherwise is if you want to smuggle an item with a digital signature somewhere it doesn't belong.
Wireless off. Cheaper, easier, and doesn't leave you open to anything else in this post.
If, for some unfathomable reason, Wireless off isn't practical, use Universal Mirror Material. The most obvious use for what Wrapper should do is hiding a weapon. Line your Concealable Quick-draw Holster with Rating 2 Universal Mirror Material, and your weapon is effectively offline until drawn. A pistol shouldn't require a square meter, so you should be able to get it for cheaper than the ¥500 base cost. Even if not, that is a small investment for Wirelessly concealing your gun until drawn.
Continuing with using Wrapper though...
"Security through obscurity isn't any security at all."
So, you are running Wrapper. Guess what? Those chokepoints/checkpoints you are trying to smuggle your item through? Those can easily use Matrix Perception - Devices running Wrapper. Depending on your particular GMs call, it could be spotted automatically if within 100m. It may require a test. Again, depending on your GMs call, it may be as easy as a single hit.
Now, the security there knows that person right there is running Wrapper. Even if you argue that they can only perform one Matrix Perception per Combat Turn, that is still 20 Icons observed every minute. With each Icon, they perform Matrix Perception - What are you? It only takes 1 hit to realize what the Icon type really is. So that gerbil in your pocket really is a weapon / heavy pistol / whatever your GM rules the Matrix returns the description as.
Now we get to the really problematic part of Wrapper.
It violates Matrix Protocols.
So?
Well, when you perform Sleaze actions, you generate Overwatch Score. When you perform Attack actions, you generate Overwatch Score. Why? Because you are violating Matrix Protocols.
Wrapper should generate Overwatch Score. It doesn't. So then either it can't be violating Matrix Protocols (and can't really work as written), or it opens up a way to adapt to violate all other Matrix Protocols without generating Overwatch Score.
Then there is the fundamental problem with the way it interacts with Matrix Perception. Matrix Perception isn't like a real sense. Matrix Perception is what the Matrix tells you the device / object / Icon is. So, if an observer can "see" through Wrapper, that means the Matrix can too. In order for an observer to be able to get what the device really is when the Icon looks differently, that means the Matrix already "knows" the device isn't what it looks like. That means Wrapper isn't fooling anyone.
Wrapper is a drek burger wrapped in sewage bun. It is poorly thought out, and poorly written. It just doesn't work in the paradigm that is the Matrix as written. If it works at all, it should generate Overwatch Score.
Either that, or the Matrix just doesn't work as it is written.