I'm not OP, but here's my two qualms with using Sublime Merge for blame:

* it doesn't do a good enough job following renames (in cases where you would need to use `--follow` to `git log`. `git gui blame` does.

* while there is a "blame parent commit" feature, it's a bit hidden and it's super slow to provide the updated blame.

Maybe they improved, I actually haven’t tried for years. I mostly would click blame on a line in sublime text and leave it at that. I just never felt smerge was good at digging around history. Maybe I’ll give it another try