Should I upgrade to lollipop? Mine is still on kitkat

When I got the phone, I rooted it, put xposed on it and all that, and I froze the system update. I recall that people didn't like the lollipop firmware for this phone. Is that still the same? Do people still hate it? Or is it worth upgrading to? It would be nice to have the priority modes in lollipop but I don't want a slower, worse performing, worse battery life phone.

Thanks for your suggestions.