Drop 'em here.
To be fair, I don't think you have to have perfect balance, especially in the three color slot.
How would you know? I don't have a list that has been fully uploaded yet. The cards are in the cube but online you can't see the full list yet. I have about 500 cards (estimate) that I haven't uploaded yet but they're ready for me whenever I find the time.
Of course we are in indirect control of the output. If we are under-serving (or over-serving) particular archetypes, they will be worse (or better) in drafting and playing. The best possible way to remedy that observed imbalance would be to allow yourself to change color balance along with every other dial we twiddle with. Otherwise we are artificially restricting/controlling our inputs on a variable that doesn't actually need to be restricted.
... and the fourth toughness on the Angel is the most relevant toughness you can get.
I think cube owners value perfectly balanced color section too much in general, this wasn't meant as a personal critique on your cube. I was just saying, if you have more Grixis cards that you want to include than Naya cards, don't feel obligated to have the numbers match. A slight imbalance in color sections is not going to have a lot of impact on the draft, and if that's what lets you include the cards you enjoy most, go for it!
if you missed the entire block