What a fun fic! Tell your daughter she did a great beta job!
I suspected from the start that Iris and Barry were Lois and Clark. Although, I did wonder mid-way through if Barry was the lookalike from the talent agency in TOGoM. (Hey, with Superman "dead" there wouldn't be much need for a lookalike.)
I love the whole long convoluted string of identities/hero identities that Clark's blown through. Very creative!