Launching and updating might be two different things. I'd like to know if I changed the name of an app from the App Store, would this prevent the App Store from updating it?
Ok so it works fine. I have an app called DrugDZ but I renamed it to Drugs & Diseases. In the app catalogue an update showed for DrugDZ so I updated it. After the update I could still launch the app and the renamed name stayed the same. So all works very well and no need to worry. :-)
It did reset the title name back to the original but the main thing is the app store recognised the app needed an update and updated it successfully.
I believe the app store checks the 'id' and the 'version number' in the appinfo.json file and not the 'title'.
So to sum up this tweak...
It is safe to rename your apps as mentioned in the opening post. Even after you reboot once you have made a change, the new name still sticks. The app store WILL recognise and WILL update a renamed app. The only slight inconvenience is after a reboot of an UPDATED app, the app name will revert to the original. This means you would have to rename the app again. Not a major issue and not an issue at all if you don't need to device restart your TP.
So there you go. If you want to rename an app or two, you now know how.