Never liked GeForce Experience and always did a custom install to not include it. The required login was a no-go for me, mostly because it seemed like almost every driver update, I had to log in again and that was annoying, especially since it was a service that didn't justify an online login. On top of that, it was a clunky and annoying interface that I simply didn't need. I don't want my games 'auto-optimized'. I want to optimize them myself. The Nvidia Control Panel also provided all the tools I needed already, even though it was an unoptimized applications.
The Nvidia App is a step in the right direction. I still find myself going to the Nvidia Control Panel for various things because it feels easier there, but I like the features the new app brings. The biggest issue I run into now is the Nvidia Overlay often doesn't work well with many games, simply not showing up for features like RTX HDR.
On the note of HDR through, RTX Video HDR now has 4 levels of intensity, while the Control Panel was simply On/Off. A setting of 4 is a bit too much on my Samsung S95B OLED TV for most YT videos. I've set it to 3, which seems a bit stronger than the On option in the Control Panel.