Wow, this is fantastic. That's an amazing amount of work, I'm going to see about starting a new group just so I can run this. Thanks so much!
I would probably have used my 4.5 ruleset...
Myrhdraak, are you still running your 4.5e rules? If so, how is going and have you made any updates or revisions? You did a really great job with it and I feel a lot of 4e players could get some use out it. Did you ever post it to the download section of Enworld? Unfortunately I am pretty much all 5e now myself, but I just feel like your work with 4e/4.5e could use more of a spotlight. I always mention it when I hear tales of someone trying to tweak 4e or combine 4e + 5e or something similar.
...I have only converted the classes and monster I myself use in my campaign.
/Myrhdraak