The phrase "little subtlety" means that something is not very subtle or hard to notice. It means that it is very obvious, clear, or easily understood. Full definition
There's very little subtlety in the book, with almost every important character moment or plot point covered several times. (wolfsgamingblog.com)
There is very little subtlety going on when it comes to actual bids, but there are plenty of mind games behind any potential bidding style and philosophy. (automobilemag.com)
Unfortunately it's handled with little subtlety, originality, and nuance, so the end result is really trite, predictable, and cringe worthy. (rottentomatoes.com)