Hello Underhill83, before anything else I must say that this deck was made for a friend who has been out of the mtg loop since 4th edition. The same can be said for myself. The decks I have posted are the first decks I've made since my return from the
ice age era.
With this in mind it might help explain some of the choices you see in the deck. I had to work with what my friend liked, namely dragons and vampires. I don't feel the dragons work particularly well with the deck and down the road my friend might drop some of them for card removal and card draw both of which you noted. Also I've just been out of the loop for so long my card knowledge is limited but is growing.
Some cards you mentioned have simply been left out because of economic reasons. Don't get me wrong the cards you listed are great and I am lucky to have a
sol ring which I can always swap into any of MY decks but I won't suggest to my friend to go buy a 10-12 USD
Sol Ring. I believe
Nirkana Revenant was left out of the deck for that very reason.
As for protection, you are 100% correct. This is a commander that will draw aggro and removal but it comes down to card space and price. If the dragons go I can see more protection equipment going into this deck as well as card removal.
After I built the deck I did check out other decks with Olivia as a commander, yours was one of them as I remember the description you gave.
All in all thank you very much for your input.