Feeder busses would work fine and it's a short enough distance to be reasonably cheap to provide good frequencies without many buses.
I've always been bugged by this alignment though - our system of suburban growth being first and foremost a stormwater and arterial road planning exercise is on clear display here. The final stop should not be tucked off into community, it should just be at the 85th Street and 17th Ave intersection. Save a hundred million for the additional track and actually put the station where there's a larger node of population and activity. Despite much of the catchment being wasted on stormponds due to poor planning decisions 25 years ago, the intersection is still a better location.
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