Thank you all for your feedback!
It did make me realise that the document was definitely a fixer-upper, and that I had neglected to include a lot of aspects, opinions & thoughts other than either my own, or ones I agreed with.
To rectify that, I wrote a follow-up document, which is unfortunately even longer. Although if you did hate or dislike the first one, I'd encourage you to read this follow-up. Its frankly, objectively better. "Burn" or a burn-like mechanic that deals with HP does still have it's own section, but it is the smaller out of the 2 major sections about the class itself.
Here is The Document Link.
Hope you find it interesting!