Selling Schurrle and loaning (?) Salah would balance it more or less out and just leave you one squad place open for a another new potential signing. So actually you'd probably be making money on this arrangement taking into consideration salaries etc.
I doubt we would let both Schurrle and Salah leave. Noises coming out from the club indicate that they don't want to lose any senior squad player but if they do, they will replace the player immediately. Chelsea weren't going to go after Cuadrado till the summer apparently but Salah's desire to move to find regular football seems to have forced their hand
I would really prefer not to lose Schurrle. He is a quality player as we all know and he is the best back-up for Hazard on the left. I was hoping for Reus in the summer to add some quality down the right but it seems that Cuadrado is also a decent fit