I agree with that point. However, the use of blame does connect the functionality provided to that one would expect when using git blame on the command line. 

Well, and so there is git annotate...

Yes, true, but isn't that more of a legacy command and blame is the command commonly used? Not that that would be a blocker. Mostly thinking about user expectation. 

Also, we are sharing this layer with internal instances and we would have to investigate how to separate the layer names. Not a blocker I think, but this would have to be solved.  

I really don't think this is worth fixing.  "blame" is a commonly used term and isn't accusatory in context.