I can confirm that B3 and 24 are gone, having passed through B3 on Friday and 24 on Sunday. B3 has very little evidence left beyond a widening. As of Friday, it was single-lane EB traffic, so I wasn't paying too much attention to lane lines, but removal is progressing very quickly.
24...yeah, that's a mess. Sunday afternoon was cloudy, so I could see the lane lines pretty clearly, but I see that becoming a mess in any other weather conditions.
15 has barely been touched as of Sunday (couldn't see the 16 plaza when passing through on US 6). Some work was beginning at B1 on Friday; B2, 19, and 23 were basically untouched as of the 3rd. 17 is funneling everyone through the middle 3 lanes, but with plastic lane dividers. 17 will not be removed as part of this contract.