P: Modernize and improve the Radial Blur filter

Yes it's something like that. Filters should be loaded with Photoshop start. Some of them are as file in folder. So you can delete this .8bf file and filter is gone. But it's not case for all filters. I am not saying that your idea is wrong. I agree with you in some way. I am just saying that if you simply remove feature, there will the consequences for which Adobe must be prepared.

At least this response explains why I'm forced to wait 10% longer each release for the application to start.

Just look what happened when Adobe removed useless variant adjustment feature:  https://feedback.photoshop.com/photoshop_family/topics/we_want_a_variations_tool_for_color_correctio...

Many tools duplicate these variants adjustments, but people doesn't like changes. So if you would like to reply on each complain...

Otherwise I think you have good Idea but you need to be carefull if you want something remove.

Right!  And you make lots of people unhappy by breaking their actions they have been using for years.  

The Radial Blur tool is marginally useful, and from what I can see has never changed since its introduction some 20+ years ago. We now have multiple blur tools, many of which are duplicated in the Blur Gallery.

The interface options for blurring a layer are all over the place. The Radial Blur tool is modal, so we can't select the center point. Box Blur, Gaussian Blur, and Motion Blur are non-modal, Lens Blur opens an entirely new window, and Blur / Blur More pretty much duplicate existing functionality at this point (Box Blur, which as mentioned above, is non-modal). Lens Blur is duplicated by Iris Blur, Radial (spin option) Blur is duplicated by Spin, Motion Blur is duplicated by Path Blur, and Field Blur is what...Gaussian Blur with a new name and interface?

The Blur Gallery tools seem to be far more "modern" from a usability sense in that they work well and have precise controls. Since the Radial Blur is still modal, the center point can't be selected, which is the entire point of Radial Blur. I've seen suggested workarounds like this https://forums.adobe.com/thread/2246182 and frankly, that process is completely asinine.

My idea: Eliminate the entire Blur menu and replace it with the Blur Gallery. Move Box Blur, Gaussian Blur, and Radial (zoom option) Blur into the Blur Gallery and simplify the codebase while improving usability.

Michel, I am afraid we're talking about two different things. I am talking about 45 megapixel images, showing full body (not only head or eye) and I want to set the centre of the Zoom Blur exactly (!) on the centre of the iris. Anyway, this is the wrong thread, I accidentally put this into the Photoshop Elements section instead of Photoshop section.
I wish you a Merry X-mas and a Happy New Year.

PS: And for me and all other Photoshop users - complaining this since 2005 or so - I wish a Radial/Zoom blur which can set pixel exact without fumbling. I'd prefer that rather than all this super difficult to implement 3D functions, 98% of all Photoshop (normal Ps not Express) users never use. But an easy to pixel exact Zoom blur can not be implemented since 12 year - oh wow, this must be the really hard stuff to code. 😉

Roland,
I can't tell precisely how often I do use the radial  blur... perhaps once every year.
I have to thank you for getting me to test and experiment with the available feature. Believe me, I just discovered how to center the blur using the preview panel. Before, I did extend the canvas to put the focus in the center of the new canvas!
Now, I have found a quick way to center with a 2 or 3 percent of canvas width max error. Not bad for the purpose of blurring which is to lose sharpness. That said, I'd prefer a 'what you see is what you get' process.