Whether it's worth the fees is something that only you can decide, but in general Sheffield's education is very good for aerospace and they have strong connections to the aerospace industry.
Graduate job prospects for international students anywhere are pretty bad because there is always extra effort involved in hiring international students, which usually isn't worth it. A lot of people suggest countries like France and Germany go against this but the truth is their international student retention rates are actually pretty poor and not that different to the UK's. The 2 year PSW being introduced for this year's cohort will help things somewhat but it won't solve everything. The effect of coronavirus on the global civil aerospace industry is also pretty bad and that is also going to affect things for the next few years.