I don't mind feedback of any kind, if anyone feels so inclined, Feel free to let me know whatcha think...

I like it a lot, but that's because I love angels as a tribe.As for the lifegain, I'm not to fond of just life gain cards. You might want to look at some cards that have more then just that effect. Archangel of Thune is a good card, it combos with life gain, pumps your tokens, and is an angel. You definitely want to add more ramp, for example Sol Ring is a must have in any commander deck. Since your mono white, another good card would be Endless Horizons, searchers out plains.(Sorry for not linking the cards, I'm on my phone and I'm lazy)

That's pretty good advice! I will definitely have to look into gettin my hands on a copy of Endless Horizons, and may just have a spare Sol Ring to slip in. I will also take a look through my collection and see about some other life gain effects, I agree with you that the more things a card can do at once, the better. Are you suggesting things like more creatures with lifelink? Or should I try and stay away from messing with my creature list?

I think lifelink would be useful, but not super necessary. As for your creatures, Wall of Omens could be an include, as white doesn't have a lot of draw spells. If your big on the life gain aspect, Well of Lost Dreams is a card you might want to add.

As for spells, I'm not a fan of Rest for the Weary, as it doesn't do much in the end. I think you should add removal, for creatures and other permanents, such as Swords to Plowshares, Path to Exile, and Disenchant.

You also want board wipes, in the case that there are creatures that are over whelming you, such as Wrath of God, Day of Judgment. The good thing about these are that Avacyn, Angel of Hope makes your creatures indestructible so its basically a one sided effect.

For lands, Emeria, The Sky Ruin, is a great card in monowhite; every turn you get a creature back.

Sorry for the late response.

It's cool. If you're anything like me, my schedule is pretty full most of the time, so I fully understand.

I have a few of those cards, I will definitely take a look and see how to fit them in. Some of the others might take me a bit to get my hands on. I'm currently spending any extra cash I have on building a mono-black rat discard deck led by Marrow-Gnawer and a mono-white cat artifact and enchantment deck. But when those two are finished, I had planned on lookin to update a few of my orher decks, so I will probably focus on Avacyn, since she holds a special place in my heart as one of my first decks. :-)

Thank you so much for the advice. I had always wanted to update Avacyn, but couldn't think of how to do it. You have given me a lot of good ideas to go off of.