To me, it's not even just a empty evil path, what the game really lacks is just any interesting alternative options (or a theme like "Do the ends justify the means") that doesn't involve murderhobo nor giving you everything you want with no consequences (The Good path).
Other RPGs (e.g. DA:O) would usually present you with a choice between taking the good option, leaving you with just the sense of feeling good but are otherwise weaker overall.
BG3 does come close once, with Ethel, where you can accept her deal for Mayrina in exhange for more power, but then it immediately undercuts this by skillchecking your way out of giving up Mayrina.
Slight tangent but this also makes no sense because:
a. Why would a evil person care to save her and a good person wouldn't choose.
b. Why would Ethel still give you her Hair if she gets nothing. Killing her means also nothing to her either.
And ontop of that, there are no consequences for this as Act 3 plays out the exact same and you don't need the hag brew to save the kid either.
And for other RPGs that do have a Pure Evil path, it's usually used as a quick path to personal power which, again, is somewhat used with Durge's first event giving you the Cape but then you subsequently lose out on the Potent Robes when you really should get both.
And then later with getting the Slayer form, it's practically worthless compared to the items you'd lose otherwise and it's extremely weak too afaik.
And this works for other RPGs because they see the Evil path as a power fantasy, no matter the cost, rather than just a psychopathic murderhobo, which seems to be Larians MO for "Evil" alternate paths.
But in BG3, it's just shooting yourself in the foot whereas the good path just keeps getting the best things consequence free.
