Why is the Android Verizon Message+ APK so large? (2.5 gb)

[Jamoc74]

I was recently going through my phone to free up space. One of the ways I do this is to sort apps by size and prioritize. The larger the app and the less I use it and it goes. I use Verizon Messages+ and really enjoy it. However the app size is ridiculous at 2.5gb. That is way to cumbersome for any APK. Why is it so large? What features does it have that needs to much space? Being a system app I don't think I could delete it even if I wanted to ...