It's true, it would be better waiting a bit before developing specific proposals about them.
That said, it already exists a thread that deals with this matter, in the Edain Discussion section.
I will merge this topic with that one, in order to continue this debate in form of a general discussion, for now.
We will see what the future will reveal us :)
In that discussion, I already left an explanatory comment; but, adding to it, I will also post again what I wrote on ModDB about the Blue Wizards and the reasons of my disapproval in case they were really implemented in Imladris.
As I already wrote, it's not that they are really 'evil'.
The problem is that they moved to the wild and distant eastern regions of Middle Earth before the beginning of the War of the Ring, and, as you wrote, eventually neglected their mission for mysterious reasons, even though we could speculate that they must have grown too fond and attached to those Human tribes, so that this relationship ended up making them forget their real nature as Istari.
But, I agree with you.
They shouldn't belong to the Free People at all; especially to Imladris, characterised by being represented as the summary of all the holiest and most benevolent spirits at that time.
There is a 'marred' and ambiguous element about the Blue Wizards that doesn't convince me at all of their true intentions.
MERGED with: http://en.modding-union.com/index.php/topic,32528.msg427032.html#msg427032