abirdcall
(she/her)
TLDR version:
Do any or all of the following -
1) Extend the duration to 10 minutes
2) Explicitly make the casting subtle, woven into your speech
3) Make the target suspicious of the entire interaction and realize he's been magically meddled with afterwards, but not innately hostile.
There are no verbal components. You just apply makeup to your face.
It is still terrible.
For those who want a no save way to gain advantage to a charisma check and due to the nature of the situation a help action cannot be used then Enhance Ability is the way to go.
I think making it 10 minutes is what it needs and it must still be used with caution. It's also still just giving advantage, it isn't letting you do something you wouldn't otherwise be able to do.