Manual deblur possibilities would be still great. If it would be possible to combine them it would be amazing. But deconvolving with a PSF would be more awesome. @David_Tschumperle wrote in this post:
So deconvolving with PSF is already possible in G’MIC, but there is no proper G’MIC-filter for this in GIMP. Maybe there can be made a filter in G’MIC for GIMP that uses two layers. One with the blurred image and one with the PSF-kernel.
You still have to find the PSF. I don’t think G’MIC can do that. I don’t know a FOSS that can estimate a PSF for blind deconvolution. I hope also there will be FOSS-software that can blind estimate PSF’s.