I've stayed at OKW many times, but only twice in a studio. We had a water view (partial) both times. I'm not 100% familiar with all studio views, as we usually stay in a 1 or 2 bedroom, but I have read reports that, because studios are on the ends of the buildings, they can have a road view depending on the bldg. I believe bldgs 52 and 53 might be examples of that if you look at the OKW map. I'd bet #30 and #31 would have some road views as well as far as the studios go.
Both times we stayed in a studio, we requested "water view". One time I got #43 (GREAT !) and another time it was 46 (also very good).
Also want to mention that ground floor studios tend to have a lot of vegetation/shrubbery growth around the balcony and this can hinder the view. If stairs are not a problem, see if you can request a 2nd or 3rd floor. But definitely mention "water view" as your request---I think that would help.
I'm sure some more people with more experience with studio views will post. Diane (dianeschlicht) is also an OKW expert---she'd most likely know.