Rob,
My opinion: Focus on the basic and "existing" troop types, first. I think the guys will sell lot of new style Kadavers, Screaming Legionaires, Ducal Militia, Trenchers, Regulars...and so on.
On the new figure concepts. I like the Mirromen concept art. Pretty much dead on! Valkyries and Sea Lions - Especially due to having the named hero for both these units...these are good ideas. The Necrotech Beastrider looks good, but I think adding a bunch of new troop types might be pre-mature. The Armored Hussars...are those the replacement for the Vulkans? If not, you have two troop types that are pretty much the same. It would make more sense to release a new "basic" troop type, than to release another Bauhaus walker.
Offered in the spirit of constructive criticism...
Oh, and Max looks pretty good.
Hi Madbrad. 
I can completely understand where you are coming from. However, it is really important to remember this is a license and as such, Prodos Games wants to add things to the license to prove how much they will use it. License-holders are normally keen to see their property being developed, but with complete control of how that happens. So far, it would seem, Paradox Entertainment are very happy with how things are going.
Nothing will be left out, nothing whatsoever. However, it is really important for Prodos to continue creating new ideas and concepts, but ensuring each one has the feel of Mutant Chronicles.
The Juggernaughts are not replacements for the Vulkan Walker. The Vulkan Battlesuit is already a strong part of the MC background and there is a model that had some serious design work put into it. The Juggernaughts are an example of Prodos Games using their concept art, as it was still good to use, but with a slightly different purpose in mind. These will be armoured Hussars, purpose built for particular battlefields.
The Mirrormen art is actually old! There is a chance they will see some updating to bring them in line with the modern range of Cybertronic units.
As for the Necrobeast, I really like the idea of the stalking, predatory landshark... Can't wait to paint some!!!!
The Prodos guys have a plan, and I certainly hope it is successful.
My outlook is based on the belief that people want to build armies that they see as having a solid base of good looking basic troopers, and then adding heroes, support and specialty troops after they get the core of their army built.
Of course, they may be under pressure from Paradox to expand the line with new troop types. And, there may also be pressure to develop as much "new" stuff as possible to try and put distance between the WZ game and the hobby sotre owners who felt they were burned by Target's demise, and then burned again when Excelsior was blind-sided with the license being yanked.
Durandel also makes the point that he is representative of a group of people who like the new stuff, and want to see even more. His comment at WZ is a game, and not a museum piece is dead on. My opinion is that you need to start out with the basics, first.
As for the future, I do want to see some new unit types, and I am mostly thrilled with the current re-vamp of the current troop types, and think there will be some new types that will appeal to me as well.
Anyway, enough of my rambling. I have stated my opinion, and either Prodos will follow my omniscent and perfect ability to see the future....oh, wait...that's not actually true.

But, it did sound impressive! ...or they will go in their own direction. Either way, I do hope for their success.
Cheers!