This is just my IMO and nothing more:

If you are going for realism, then your filming needs to mirror realism as well. Also, remember you don't have to flip in and out of every grind. A simple clean exits out of grinds can look just as good, even more so if you tweak the landing so it does the different animations each time to vary it up.

I would suggest looking on here or YT for tips video on using advanced free cam, there are a couple of good ones about.

Oh and the transitions are deffo not needed. a simple cut, or very short fade looks so much better IMO.