I didn't go to the meeting last nigh, but looking at the posted build alternatives I see two major changes.
On K between 3rd and 7th, the existing bike lanes would be replaced with either protected or buffered bike lanes.
And, on New Jersey Ave NW between I and H, the road would be converted to two-way traffic with bike lanes (perhaps protected?)
I don't think they show what happens around Mt. Vernon Square where once they planned "cycletracks".