Hey Michael,
Good questions. You’ve got your template organized in chunks, which can be awesome.
I can’t see exactly what those chunks contain, but I’m guessing that you could try popping the lines I gave you into the _header chunk (rather than the template itself). Using your own TV names, of course.

Give that a try. This can be a little confusing because the old-school MODx meta method sort of automagically sticks your metas into your page with nothing explicit in the template.
To your larger point, I agree... keywords are less important now, especially to Google. They still seem to be a bit more important in Bing and Yahoo. Description is more useful, as it becomes the blurb under the link title in Google, so you can really get just what you want into that spot. I would just avoid getting too "pimpish" there, else you’ll turn people off.
For pure SEO, yes, title tags, header tags, and content are more important these days, which to me makes perfect sense. It’s closer to reality, and no keyword stuffing, as it were.