Worf as captain would be something I'd love to see. Either on the Enterprise, or a new ship. Not because I want all the characters to become captain, certainly not. But I do feel Worf has changed so much over the last few years, and became a better man. I think it's time he became a CO.
As for Silent Weapons...
I liked it. Really well written, the plot had good pacing, and you did want to know why everything was happening the way it was. The ultimate pay-off however.... I don't know. Didn't really do it for me.
The few bombshells, however, were dropped hard like any Mack-bombshell. I was definatly amazed at some turn of events hear and there. And as for Chen.... I know she still has some nay-sayers, but I've liked her from the get-go, and like her even more now.