Your approach is interesting and would be useful when noise reduction in ACR/LR is not sufficient. The parametric editing in LR is attractive because the 36 MP D800 file expands to 200 MP in a 16 bit TIFF. How do you determine the PSF for deconvolution?
In the screen shot above the deconvolution controls are the top right and bottom left boxes. The top right has 3 types, Van Cittert, One step Gradient (VC with a mild smoothing in between each cycle) and Richardson-Lucy. The bottom left is all Adaptive R-L. Adaptive R-L like Adaptive USM engage only areas that meet defined parameters. These are superior to the standard versions in other software.
The PSF for all methods is defined by size (3x3, 5x5, 7x7,9x9) and type Gaussian (most common) Binomial, Box and Custom. The custom controls are lower right. You can enter values or select from the image with the mouse. If you select you can scale the values.
An example of the use of custom would be to reverse lens defects. If you take a picture of the night sky you have point sources with atmosphere effects and lens effects. You would probably deconvolve with Gaussian. If you take a picture of an artificial star or points without miles of atmosphere to contend with the errors are from your lens only. If you right click on the deformed point the custom box fills with the values of that selection. Center it. Deconvolve the image. You should get back to a point without diffraction rings. Save that "custom" for use with that lens. If you want your rings you can enter them from calculation around the central value and save that.
If you have a lens with shitty smearing in the corners you could use this process then apply it to the corners with the rest of the image masked out.