Thanks and glad you like the mod, however, you are incorrect in your thinking.
It appears you are not reading or understanding the SQL language provided in the install correctly.
If you look at the SQL code closely, you'll notice that the configuration group id variable is set during the SELECT statement, and is set to the specific value "WHERE configuration_group_title= 'Google Analytics Configuration';".
That group id differs between sites and the variable is set as such to properly remove the correct configuration values as needed (and if present).
A number of contributions use this same logic as it provides a means for users to install a module into an "open slot" without conflicting with other configuration group ids on their system.
This module is in use by myself on many sites, and thousands of other Zen Cart users (look in the downloads section) without any problems relating to "proper functionality of Zen Cart."
In fact, just to be sure, I tested your concept (I always test), and the patch works just fine without deleting the configuration keys you mentioned above. :)
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