bittrex have done the decent thing and given people enough time to withdraw their coins. i don't really see what the issue is here. when it comes to forks i wouldn't be inclined to believe anything a third party tells me they're gonna do. control your own coins and you're set.
Yes, Bittrex did well. Now it is not difficult to send coins from one exchange to another. You will need a few minutes for this. The fact that Bittrex doesn't support Callisto suggests that this fork will be weak and useless.