I'm the author of TitleExchange. So I may make some comment here.
TitleExchange currently don't have any direct support for FCPX. But there is a little app called XTI which comes along with TitleExchange. This app allows to convert either a Spruce STL or a SRT to FCPXML. For details you can have a look at the Help menu of the app.
One thing which no developer (except Apple) can change is the performance slow down of FCPX when handling a lot of Motion Templates.
Feel free to contact me directly.
Andreas
Some workflow tools for FCP [
www.spherico.com]
TitleExchange -- juggle titles within FCS, FCPX and many other apps.
[
www.spherico.com]