I have decided to add comments back to the site for the time being. I'm now using "Intense Debate":http://intensedebate.com instead of "Disqus":http://disqus.com with the former seeming to so far have a far nicer admin interface than the latter.
I'm also reasonably pleased with how I've been able to customise the look and feel to integrate it into the blog as seamlessly as possible.
Hopefully Intense Debate's spam filtering will hold up to scrutiny however if moderating comments becomes too much of a chore, I may disable them again.
I still encourage you to send me feedback on Twitter but in the meantime, happy commenting.