I'm confused at why you, and others, say Eastbound ramps are not an option.
From Dec 4 2013 meeting (see presentations below) Bowker Overpass Reconfiguration Alternatives, which they claim to be studying and analysing, including Alts 3 and 4, pages 14 and 25 (pt 1) - 9 (pt 2), include a 4 ramp...