no, haven't read Destiny yet, but I do read the spoiler threads, so I know Chen isn't in there much.
If you though GTTS was a pretty decent read, then you're going to be in for quite a treat with these next books.

I've said it before and I'll say it again, Mack's work is to Trek lit as the new Battlestar is to Televised Sci Fi.
The rhythm and pace of BSG can sometimes be like a dance or a symphony, with the narrative full of harmonious complexity. If you like that sort of thing Destiny is going to be right up your alley. The work that Mack, Ward, and Dilmore have done with Vanguard is quite the same.