Word Choice

Both are clear. That said, I prefer the sound of the second sentence.

If I had crafted the sentence, I'd have gone with, We are working with the insured regarding remaining repairs.

You could go 'archaic' & 'archa'ot'ic'

'We'eth doeth worketh witheth thee'eth insuredeth abouteth thee'eth remainingeth repaireths'.

Depends where your psyche's at, of course.
Marketh

Thank you.