Did you notice any issues in the Online Patching Enablement Status Report output?
For the items in SECTION-20, you can run the mentioned procedure for the relevant tables and rerun the compliance script to verify.
Regarding SECTION-26, are these objects referencing seeded tables or their editioning views?
a) You will face the error "ORA-38818: illegal reference to editioned object" when accessing editioned objects using non-editioned ones.
b) It will invalidate your custom objects.
e) How are they accessed in the first place?! If you have private synonyms pointing to the EBS base tables then simply replace them with ones that reference the apps synonyms or editioning views.