P: AI Denoise output to TIFF option vs DNG

Yes, definitely realize these limitations. However, in many cases the resulting tiff is perfectly usable. Regarding future advanced model, I still have the original raw so that's a non-issue (for me).  While some may might balk here, my profile and white balance are set prior to using Denoise. I know this bucks against those down in the weeds for details, but for many, getting the noise reduced on a high ISO shot is all that's necessary. Having a tiff output option makes it more usable for them.

Personally, I shoot a large amount of high ISO (+12,800) photos (sports) and simply cannot afford the space it takes with the DNG's. Having to painfully bring each of them into PS to create a tiff version, followed by importing them into LR and then having to go back and delete all the DNGs is a large waste of time. Adding a tiff option in the LR details section of the develope module would eliminate all of that.

Realize by doing this, you are throwing away data. 

The Enhanced DNG contains your original raw data also so that, if in the future, you wish to run Denoise again with a more advanced model, you can without having to resort to starting over from scratch with your non-enhanced DNG.  You are also 'baking-in' profile, White Balance and a few other settings by doing this.