All I've seen of project blu is what's in the forum and stuff Harmy used in his despecialisation. I personally don't know how I feel about using EEDI2 in a way that it isn't designed; by using it to stretch the picture horizontally it intorduces far more side-effects, for instance have a look at the background in your R2 pic, You_Too, where the stone patterns have been somewhat reconfigured by EEDI2 joining what it thinks are "lines". Even the scuff marks on R2D2 have also been reconfigured into a pattern thanks to EEDI2. I was wrong about the grain removal, it's been obscured by EEDI2.
In any case, as I said to begin with I believe the results are beatable. I need to aquire the NTSC disc to go much further. But for now yes I've removed the jaggies without using qtgmc (thank goodness because it's frightfully slow) or loosing much if any quality, here's a screenshot you can compare it to my earlier one from the same scene. For reference, I'm using EEDI2 once for deinterlization and then nnedi3 for scaling (although it makes little difference at this point if I use nnedi3 at all):
