I am sure there is a way to do this in FCP or Motion. However, what I do is to build my bulleted list in Keynote against a green background. Set up the Keynote presentation as 1920x1080.
I then use it in FCP or iMovie as a greenscreen effect.
After creating the bullets in Keynote, I export them as a QuickTIme Movie with a timed advance. I then import the QuickTime movie and edit it as I need it.
Keynote has dozens of text effects and builds, including the fade that you need.
Here is a quick and dirty sample.
This bullet point template for FCPX seems good - http://motion-master-templates.com/free-templates/bullet-points
It requires Motion installed & I can't confirm it does what you want but seems pretty comprehensive.
The upshot is, though, to get proper control over this sort of thing, you need Motion - or someone who creates a template in Motion for you.
Or a completely different tool, like the answer above.