I would not change a thing unless you have to, seeing as you bought the plus that's ready to fly you will be flying on the t6 transmitter, if I'm not mistaken so if you did change the gyro you would need to look at an rx or a new tx as well,
The plus is a good package to start on, leave all the plastic parts as if you crash a part will break and save other parts, if you start upgrading and if you crash you bend and break other components as well,