I've already turned off animations but found it didn't help much, the main lag is in the gallery and the time it takes the lock screen clock to refresh when you wake up the phone is horrendous for a flagship phone . I always thought not having a removable battery would annoy me (that's why I always stuck to samsung) but when I have thought about in all the Samsung phones I have had I never bought an extra battery. I am torn between making the switch or rooting and flashing a custom romantic in the hope that it will rid the phone of the lag.