Basically, QuickBuild has inheritable option which is one of the most powerful way to control many configurations without confusion.
 In addition, it supports some useful feature like "Condition" option in Varaibles.

 However, some varaible should be override because check-box option cannot be work with conditional code. (at least till 7.0.17 version)
 If specified check-box value should be different against inherited value in a configuration, there is no way to change the default value("yes", or "no") except override.

 Therefore, if check-box option will be changed to script like "Condition" option in variable, unnecessary override value can be deleted.
 If you could implement, it would be very useful to reduce override code for many QuickBuild users.
 If all check-box value("Read Only", "Allow empty", "Remember") can be changed as script value, it might be satisfied all user's requirements.