The issue, of course, with sitting with Saros until Askarov is ready is that Saros is going to require a really big raise to keep around after his contract is up (not to mention possible trade protection), and then you have an asset that's hard to move and a bunch of cap tied up at the goalie position, which is less than ideal. It's not a death sentence, of course- Florida just made the finals with (until the playoffs) an underperforming Bob on a massive contract, after all.
My point is that while those who want to keep Saros above all will point out the huge risk in trading him, there's also plenty of risk in signing him to a huge contract. If Askarov does pan out and you want to free up cap at G, now you're possibly having to dump him for pennies.
It's a difficult decision and I don't think it's quite as simple as saying "keeping him is the safe choice".
Having said all that, I don't think there's a "wrong choice" here. I just think Trotz would be smart to keep his ears open, which I think he will.