The documentaries are amazing, and are much more fascinating than those about TNG. With the exception of those on their genesis, casting and development IMO. It just comes down to the better a show is doing, the smoother and less frustrated those involved are.
Mind you, I already knew and had heard much about the TNG years. Michael Piller saving the show and helping develop a strong writing team, Gene's passing etc. What those working on Enterprise really thought was mostly new or a confirmation of mere rumour.
I enjoyed Enterprise, a fair bit more than others generally seemed to though. So what's icing for me, is probably a huge selling point for you. Brannon Braga seriously gives himself a hard time. Going through the series, you'll either think he's over doing that or it's deservedly so. Some shows he hates aren't terrible, just by-the-numbers. A few are worse. But Trek had sunk to lower depths, on more well-regarded versions.
The cast reunion and discussion on Season 2, was one of my wishes granted really. Only actually finding out there was this missing episode that never got shown, could've topped it.
There's a lot to chew over and strong opinions, not all of which I necessarily agree with. But that no subject was off-the-table, makes them some of the best accounts of TV production I've come across.