Me again
I would love to see:
1) an offset slider next to the Blur slider to control the offset of a blur....IE so that you (once happy with the amount of blur) could then use this control to force it into the confines of the object outline at one extent...or balloon it out like applying an addional underlying contour expansion, on the other....so this would expand or contract the extent of the outside of the blur...

and also
2)another slider to control the thinkness of the blurred portion....IE of the periphery "band" around the object that is actually the blurred part....

This would be nice...

An "offset blur" control doesn't quite make sense from technical point of view. I understand your idea. The thing is, blur is not a independent property of an object--it's a filter and if you modify the object the blur will change to reflect those modification. So if you want to offset the blur, you have to offset the object. In which case, you don't want a "blur offset" slider, you want a "offset" slider which would do exactly what you had in mind without having to be dependent on the use of blur. Now the question is, does Inkscape need an Offset slider when it already has Dynamic Offset? Certainly a slider makes it more accessible, but there are hundreds of controls that could be promoted out of the menu and given their own slider, but then we won't have any room for the canvas

I feel the same about the blur slider also. To have such a prominent position on the UI I think the average artist needs to use it for 20% of the objects in a drawing (That's just my own idea of a percentage). Some artists do indeed use blur far more often than that whilst many other artists never ever use blur. So, how many artists use dynamic offset intensively enough to give it its own slider in the GUI?

quite a measured response there...
And i do see what saying and i did actually understand that initially iE that what im basically askilng for with the blur,
(with respect to the blur offset....) is exactly just a short-cut to the normal offset....I know that, and you of course 100% right.
But that should make it all the easier to code as its just a short-cut to the offset tool from the blur section.....

With respect to being able to adjust the thickness of the blur band....it did occur to me initially also that this may be similar to just winding back the am ount of blur...so in-fact may be a totally "non idea"....but again i wasn't 100% sure of this so i thought i would throw it in there.

But a shortcut to the offset functionality already in inkscape from the blur area of the UI would be cool.....
And i dont believe this would add un-necessary clutter as (im not asking for "front row seats" for this thing) it would be under the blur slider which is an area of the UI that is actually quite vacant....so i think it would be welcome....

But even failing this i think it would even be cool (as a compromise) to this, would be to have a single check box...
"constrain to boarder" which would automatically apply and throttle the amount of offset on the object depending on the amount of blur applied so as to achieve this......

IE to ensure the outside of the blurred zone roughly ended at the object outline not bleeding too far beyond it...

But i do feel the idea of the shortcut to the offset functionality would be worth it.
Not of course to "Gun" users who are already very happy with the mastery they have of existing UI structures that achieve this but more for the newbie who would simply find it handy for this offset function to be also offered up along with the blur function.
As often if you are applying blur and you have not employed enough overlap then you will get unwanted background exposure...which could be neatly fixed with this shortcut without manual editing.