I finally sat down and read Storming Heaven over the weekend. I've owned the book for several months but tend to procrastinate over endings. I do this with television series and computer games as well. I don't want them to end. I've managed to stay away from this thread until now.
I've been enjoying the series since I first picked up in the middle. Then endeavored to collect the previous novels to get the full effect. And boy did I ever. Not that I haven't already been aware of how much I enjoy the cast of characters, but I hadn't realized how much Zeke meant to me until I read his fate. I almost threw the book across the room I was so angry. But I refrained.
Overall, I was satisfied with the series conclusion. I continue to be impressed with how seamless the Vanguard story retroactively fits within context to the original television series. Why hadn't we ever heard of Vanguard station before? Well, the books explain this pretty well.
Something that I had personally theorized for a few years - but wasn't touched upon by series conclusion - was that the alien described in J.M. Dillard's novelization of Star Trek V: The Final Frontier, may have been a weakened Shedai. IMO, this still fits. That great barrier could well have been real enough to have cut it off/protect it from the fate of the other Shedai in the Vanguard novels.