If the era between ST6 and ST7 will indeed be what they are going for I applaud them.
A story is only ever going to feel more real, rich, and rooted when embedded in a well developed context (cultural, historcial, political, social, ...). Sure, going post ST10 would probably be easier and more open. But I would hardly call the era between Kirk and Picard "boxed into canon". J. J. Abrams wanted to be free of canon and the result so far was bland action and a variation of the very canon he tried to get rid of.
It's a highly interesting period in the original/prime/real Trek universe with not too many known details. It's a time with a lot going on diplomatically and politically. The Khitomer conference is over. The reality and results of its decisions and definitions just kicking in with many different interpretations of right and wrong and probably a lot of characters trying to shape and move the future into a direction favorable to their little corner of the galaxy. It's a cross country race with the start, a few known checkpoints (Sarek's diplomatical involvement, Narendra III, Tasha's crossover and Sela, the Khitomer massacre, the house of Mogh, ...), and the finish clearly defined, yet the rest is open to bring to life in a bold and creative way.
Pretty much all rumours and facts about the new show feel like an honest dedication to deliver some quality new science fiction. Of course it may very well fail but at least they seem to be determined to make Trek great again.
Which means I'm hopeful and of a positive attitude. And that's a very, very rare thing.
Greetings...
Nef