M030 CPS04 includes a new workgroup manager for SolidWorks 2015. By selecting this for installation, I believe this qualifies as "adding a product". Would you agree?
If you are doing 10.2 M030 to 10.2 M030 CPS05, then you don't run update_tool.
If you are updating from previous date codes (M010 or M030) to M030, then you run update_tool. This is what I did. I updated to CPS05 after the update to M030 from M010
I don't support installs and updates, but I checked with some of our guys here that support it. In general, we do not update other products, such as Apache or Java, as part of the patch install unless it is absolutely necessary. We also try to minimize the introduction of new functionality via patches--that is generally reserved for maintenance releases and upgrades.