I'm really impressed at how effective Patch 1.4 has been. So far it hasn't caused any more glitches for me, but it has fixed a handful! It released at a very good time for me since I had managed to leave a gap in my save backups of about twelve hours. When I went to Skuldafn in the main quest line (yes, I've only just finished the main quest line despite owning the game since release), one of the puzzles was broken, and I couldn't progress or reload a save to fix my problem.
All in all, it worked out since I was able to continue as soon as 1.4 arrived. I'm still Level 29 because I don't like the choices I have to make when levelling up. I think I've bought maybe four perks and I haven't yet taken a side in the civil war. Considering that I'm a Nord though I imagine my path is going to be with Ulfric and the Stormcloaks.
I also acquired the Ebony Mail today. Not only is it the most badass looking armor I yet have, it also seems to offer decent enough protection.