I don't think anybody involved with 'Wonder Woman' did so with the expectation or even hope that it'd be Oscar material. Indeed I'd say this movie felt more like the beginning of something than a culmination. A foundation to build on rather than an end-goal in and of itself, and as such expecting that level of recognition straight out of the gate is just unrealistic.
I liked it in the cinema on first viewing but on hindsight it feels like a a puzzle piece that got no decent wider puzzle to slot into unlike with the MCU output it emulated (you may despise or be indifferent to Thor The Dark World but it served its purpose as build up and backstory to the wildly acclaimed Thor Raganarok).
All that said I think WW deserved all the praise it's received, both for being a genuinely good and entertaining movie despite a few flaws and because it
I personally feel that WW has been overpraised, not because it's a bad film on principle, but because it's a competently decent film that stands out from a series of incoherent and lacklustre movies, while TDKR (while, IMO, objectively the better film) has been over analysed and unfairly degraded by a vocal minority because it was a follow up to the even more superior BB and TDK...