Considering khan had to strip naked to hit 147 it makes no sense at all for khan to demand the fight be @ 147.
The appeal of a Khan-Brook fight for most fans is the desire to see Khan do the chicken dance once again and get KO'ed which he likely will if he fights Brook, even a weight drained, slightly faded version of Kell.
I agree Khan deep deep.down doesn't want it. Look boxers just know in their hearts when the risk is too big. He knows a loss against brook will leave his legacy a bit shaky as he wants to be known as the best 147 ever from the UK. Khan will probably now say 80/20 split or no fight.
I'm past caring to be honest because at this stage it's a money making fight only. There's no world title or contendership at stake and neither could be said to be in their primes. Brook's career has probably been the most disappointing to me in recent memory. I was convinced at one point he would have fights against the likes of Garcia, Thurman, Pacquiao and it just never materialised. Khan, whilst he's lost a few more than Brook, has a much better resume.