Yea, Sins of the Father is pretty good. I was waiting for the full version of that, since we were teased about it during PAX 2014. That New Order song is... alright.
That ending to MGS 4 was great. The true death of Big Boss was a great tie to to everything. Kojima said that was his last full MGS game.... which turned out to be a flat lie... and it would have been fine as the last game for me. MGS 5 isn't necessary. He's already filled in the gap between Big Boss going rouge and the birth of Solid Snake through the spoken story. It's weird, since the spiritual end of the franchise ends with the death of big boss, and the physical ending, ends with the birth of Solid Snake.