In my opinion, the developers need to leave the original graphics modes in the game and add new ones labelled "Pro" alongside those to make it obvious that the game has been patched with Pro support. This also means that you can switch back to the original Performance and Resolution modes if the new modes are buggy or inferior in any way to the originals. The game can still default to the new Pro modes on running on a PS5 Pro for those that don't like to mess around with settings.
The lack of consistency with the way Pro enhanced patches are being implemented is the most annoying thing for me. Some developers are leaving in the original modes, some are just removing them and adding Pro variants and others such as Ubisoft are forcing just a single mode. And with games like Silent Hill 2, which is listed as Pro Enhanced, I am not even sure if the game is actually enhanced as it has the same two modes as the PS5!
After the initial thrill of testing out games on the Pro during the first week, I am starting to become increasingly disappointed with the quality of some of the so-called Pro Enhanced patches. Seems like most of the effort has gone into the first-party games - understandably, since these have to sell the console for Sony - but far less effort has gone into the third-party games. Some of these just feel rushed/unfinished (Star Wars Jedi: Survivor, Silent Hill 2, Dragon Age: The Veilguard, Dragon's Dogma 2, etc). I can understand this to a certain extent as third-party developers are being forced to support another platform going forward but may not want to spend too much time or money on updating older games that have already been out for some time, especially for a new platform with a small user base.