convection most definitely did not block moisture transport, as that heavy convection was modeled for days, even on guidance showing a heavier hit for MI.
again, the difference came aloft, with an even jankier H5 look...which is also why the surface low kept trending east.
let's take a look at the NAM, which was one of the last to let go of a snowier solution... pretty clear cut look on why things trended southeast and weaker. obviously if you trend H5 jankier, the associated surface low in turn ends up weaker/southeast, and moisture transport/850 low shunted east. also, note on the second image of the heavy convection modeled days ago.