This is one gripe I have with them having to wrap this up so quickly. It took years of Varys whispering in the ear of the Mad King to drive him mad from paranoia (and this is partly why I don't think Varys is as loyal to Targs as we may think) and THEN go crazy and burninator. I get that Dany has been through some stuff, but I just don't see how this is bubbling up so quickly.
Absolute power corrupts absolutely?
A prototype that Bronn has never seen or used but was immediately able to intuit and use it well enough to ground one of the largest dragons ever, lol yeah there's another hole...
Honestly, I think this is a function of the shortened season more than anything. Much of this plot setup was probably culled in the interest of brevity. Not enough screen time for filler. Probably something along the lines of:
Quiburn develops prototype, shows it to Cersei, rolls out production, gives it to the army, everyone trains and knows kinda how to use it.
That bron's such a good shot, may be far fetched. But he did miss.
I really wish we could have a Neo-Architect scene happen between Bran and Baelish discussing metaphysical implications for choice and such hahahahaha if only... Bran certainly is super Neo-like right now, permanently looking like Neo does when he first starts seeing the Matrix in all code.
Morpheus is so much cooler than original 3 eyed raven