It took me a while to get my head around it, but the Generate Text Effect - as well as working in the Editor - of course, also works in a Composite shot.
So, create a Black Plane, drop Demult on it to make it transparent, then the Generate>Text Effect and have much improved text rendering, which can be manipulated in the usual ways.
Only caveat I can find is: whereas the Normal old text will redraw the letters at the appropriate size when you scale the Text Layer, so they're at the best quality for the size; once they are drawn on the Plane with the new method, the size is set. Which makes sense, really.
So, if you increase the scale of the Plane, you'll start to see jaggies in the letters, so don't do that; increase /decrease the size of the font itself if you want it to change and it'll be redrawn at the new size and the best quality.
The results are much improved when used with 3D Extrusion too.