Hi Vicki,
IMHO, your roots look fine & in very good condition. Yes you have a leaf with sunburn ..apart from the fact you may not like the look of it, it looks OK...
The only thing I see wrong is that you have cinnamon powder spread a bit on the leaves. Cinnamon dries the parts of the plant you put it on. and as far as I know should only be put on 'cut' edges, so as to help withthe 'scaring' of the plant tissue. So, I would wipe it off ASAP!
the actual 'crown' looks ok to me (middle of the top 2 newest leaves) apart that one is sunburnt and the other as you say has a problem... (can't say what exactly?) I think if you keep on dousing it with your homemade remedy should be OK, as long as does not get worse-(from what I have read, as I 've never tried the mixture myself). Your oldest leaves (bottom ones) are starting to go 'yellow' but that is normal for a phal to lose it's older leaves....
I would watch very carefully that the roots keep on looking like they do & that it starts growing a new leaf in the crown.. this may take months..but quite honestly to me does not look 'that bad'.
You will no doubt have other opinions

Good luck! and keep us posted.