Like everything, it's just a matter of personal preference.
For me, I like the MkIII as a suit and want it in my collection. The original version doesn't do it for me as it just looks too off, and while I fully realise these are just toys, it looks too 'toyish' for me.
Sure this new version is expensive, but I am probably not gonna find the original any cheaper these days either. And this one looks a lot better.
This doesn't have the articulation that the other recent suits have had, but it still has some and more than most other characters.
The Mark VII is one of my favourite Iron Man figures so far, but that articulation is pretty basic (as I had the 42 before that it seemed especially poor) but I still wanted the figure and glad I did.
I would prefer it articulated more over the removable chest/ab plates. I would prefer more die cast pieces. I would prefer considering these are both not true, that it cost less. But it doesn't. And no amount of complaining will change that. Hot Toys will most likely never know (or care) what we think as a board, this will still sell.
I think a lot of people are following the negative hype on this one. I am keeping my order for it, as in hand I expect to be perfectly happy with it.
But I hope the VI is a more standard die cast release if/when...