The issue here is that annoying error frame popup box being thrown in your face, even if you don't want such a reminder.
Very similar to what NRT (an otherwise great Rabbit mod) does asking about taking raid attendence when a boss goes down ;). One mod is lacking what the other has. You can turn off the annoying popup reminder (what is lacking in DurabilityFu) that interferes in taking screenshots of the kill and/or pops up when the fight isn't really over. But then you can't do a raid attendance and/or have it done automatically (what DurabilityFu allows regarding autorepairs).
As to having other addons doing auto-repair or not, I have no issue with that on this end. But removing choice that has existed forever in a mod is usually not a good thing. For example, someone has been using Minimalist for months to do autorepairs. That annoying popup still appears in DurabilityFu whether or not the person disables the autorepair option in Minimalist (which does give you a choice). Not a big fan of being forced or pushed to use one mod's functionality over another's, even if that functionality is identical.
So an option to turn the popup on or off would be great.
As to something more compact & lightweight than what DurabilityFu was and/or is, we already have FuBar_DuraTek.
That new static popup needs to be made optional as opposed to mandatory; I really dislike it. Pretty sure its not ideal for some others either (have had 2 guild complaints so far). Some may like it, though.
Have commented out lines 248-255 in DurabilityFu.lua to get rid of it, but not tested yet.