The demon form modification Huge Size (DtD Core Rulebook):
Appearance: When the demon takes on his demonic form, he grows out of his skin into a huge monster.
And the demon form technology Collapsible (Flowers of Hell: the Demon Players Guide, on p. 125) :
Appearance: Parts of the demon’s body seem to flicker in and out of existence rapidly. The overall effect is like a TV tuned to static or like a strange screensaver that progressively distorts or erases her body, only to have each area return to normal as the phenomenon moves to another part.
Separately you can see how these forms would arouse suspicion, add drama and counter balance the positives. Combined however, they seem to cancel the negatives (collapsible only makes you flicker briefly) and the positives stack.
Whilst I doubt any sane storyteller would allow the +3 to hide etc. if you grew then shrank to size 5, you do get to keep the huge size health bonus:
These changes in Size do not affect the demon’s Health or Attributes.
Taking this form ability imparts 4 extra Size from creature type to the demon when he changes his form.
It feels like combining these two is too good, and that I'm missing something. Essential is a compromise roll at +4 (or more) to gain 4 health, for any where between 10 and 15 health total! In addition as far as I can tell, manifesting partial demon aspects can be done indefinitely.
So what am I missing out, is this OK?