The new units:  expensive + you cannot build them so they'll always be scarce and since they have no special ability they are superfluous. I'd rather have two Agemas than a Paeonian any day.
We already have dozens of units we never build and never use + a bunch of special reward units that never add up to a significant force.  Like imperial Psilos and Hoplites and those blue Agemas.
Both graphics are disappointing. 
The Iberian looks like a gold wrapped chocolate bunny or a Christmas ornament with a hook on top so you can hang him from the tree.  He looks inanimate and "flat" - more like a priest that a warrior. 
The Paeonian looks like he OD-ed on Burger King meal deals.  A fat caveman... very scary indeed.
Why are they huge compared to the other units on the army overview screens?  They look poorly proportioned...
Bottom line: Over-hyped luxury toys for bored coiners.