Okay, I had a chance to actually go through these lists and I put together some of my thoughts.
In regard to the two listsI think the two list idea is
not bad.  I am not sold on it either but I am certainly not opposed to it strongly.  The only thought that comes to mind is that having two Imperial lists makes it that much harder for another Imperial list to distinguish itself, either in this supplement with the Inquisition or another supplement down the road.  Rare is the day I agree with Zombocom ÂÂ

 but I share his sentiment that it just
feels wrong.  I simply can't put any real concrete argument together against it. ÂÂ
Things I likeI like the larger Sentinel formations.  It keeps the army from getting too 'popcorny'  (can I use that as a word?

) and the figures always appealed to me.
I like the reduced amount of armor on the list itself.  You can still see SHTs and LR tanks but obviously not in the numbers you would in Steel Legion.
I like the Whiteshields* (see below) in general.
I like the Sanctioned Psykers, although I wonder if they would be better off as separate units unlike a Commissar.  Not because they are balanced poorly - only for the sake of modeling and playing.  Epic players may want to field them as models and it is easier to drop a unit into a formation than just marking it or premodeling things.  It just gets a little complicated with the Commissars AND the Psykers falling into the same type of situation model-wise.  I am curious what other people think...
Things I would possibly changeI'm not sure there is enough of a distinction on the list itself between Whiteshields and regular infantry.  It may behoove you to come up with a separate datafax and descriptor for them (Whiteshield Infantry should do fine).  Otherwise confusion may take place (see the post above from Mephiston). ÂÂ
I'm not sure the Sappers need to be in the list, although I'll let the fluffmasters debate over that one.  My feeling on it is if they don't appear in the fluff, remove them. ÂÂ
It may be interesting to remove the Death Strikes from the list.  Heaven forbid there be no Death Strikes but according to Armageddon...
Deathstrike batteries have become an increasingly rare sight on Imperial battlefields; the size and logistics of their deployment often seeing them overlooked in favour of more
mobile units such as the Manticore.
_________________
author of Syncing Forward and other stories...It's a dog-eat-dog world, and I've got my Milkbone underwear on.