That's a good build, don't shoot it down yourself! A quite difficult colour as well and you've applied it very well.
If I may, there's one thing I'd like to comment on. Rather than cutting the big rear decal above the wheel arches, soften it well with quite warm water (with a drop of dishwashing liquid in) and really give it nowhere to go by adding microsol (or another decal softerner). Some people also use hair driers to help, I've never done that (yet).
Apart from that, thumbs up! And enjoy the Focus, I built the Performance blue a while ago and it was quite a nice build if I recall.