I really dislike your interpretation of Magic Find and putting it on NV exclusively. One of the things that people tend to complain about is how useless a short farming session feels versus a long one specifically because of how NV works. If the only source of MF is NV, and it takes anywhere between 500 (lord) and 50 (still LORD) stacks to reach the cap, I think you're taking too much freedom from the player to enjoy the game during brief sessions. If they want to farm tons and tons of items, but they'd rather invest in gear with MF instead of investing huge amounts of time, your proposition punishes them in this "2.0" vision of yours by removing that possibility.
Your other changes are...okay. I won't say they're -bad,- necessarily, but putting out legendaries with 9 levels of rarity will ultimately make the bottom 4-5 of those legendaries as useless as most current ones already are. It doesn't really change much versus the current system, and the whole "identify each of the following" achievements will just create a massive market for selling unid'd legendaries of that type, which isn't exactly the 'discovery' you are looking for.
And then you want crafting to be more like MMO crafting, where you have to hunt down a variety of different things--things with frustratingly low drop rates in some cases. Would these crafted items automatically be better than drops? Would you make the grind less about actual usable items and more about salvaging everything (exactly as things already are)? If they are not more valuable than the potential drops, what justifies this long-term and unreliable grind?
The upgrade system for the Mystic, too, strikes me as a bit odd. Permanently upgrading stats on a certain item will feel terrible when another item with better stat rolls drops and you have suddenly wasted millions upon millions of gold for essentially nothing. It would actually remove some of the excitement you mention of finding ultra-rare items by clashing with your long-term investment...because people never expect to have those Level 9 Legendaries drop for them, there is no doubt that they will be upgrading their original pieces as high as they can. Also, would these upgrades make the item itself Bind on Account since it requires BoA materials to craft? If not, you would still have people primarily buying items from the Auction House and not playing the game. If it does change an item to BoA, you'd be stuck with an inferior hunk of metal in your inventory that has literally no residual value to you...except to be salvaged into one of the dozens of components you already spent to upgrade it.
On the surface, your ideas seem fine, if only because they're different from what we already have...but they also introduce a great number of issues as pertaining to the different playstyles that people have, the value of legendaries (which is a problem now and in your scenario), and the return on big investments. Your changes are nice for the ultra-hardcore player with millions upon millions of gold and thousands of hours to burn, but for the layman it just seems to make things far more difficult.
Edited by Jortalus#1344 on 7/23/2013 8:32 PM PDT