Whether you should or shouldn't rest solely with you. Having said that, if it were me, I'd update. I always look forward to improvements to an operating system.
Yes i know updates bring improvements but iam asking if those improvements are really good and make my phone better (or the same in little hand) or they will slow down my iphone 5s?
Iam making a comparison with the case it was with ios 7 and iphone 4 remember???
Definetly is worse... I shouldnt update it... I made clean instal and set up as new and the phone isnt responsive as before , it lags at scroling and doesnt detect my touches right