Default Phone Help

I have updated to 4.3 originally when it come out for T-Mobile USA. I didn't uncheck power saving mode to be off before the phone updated. Now, power saver acts awry. I also have terrible battery life on 4.3 yet my battery is rated in good health by HTC's battery test. My screen acts unresponsive at times at night when on charge as if it has terrible sensitivity, but I calibrate it to no avail. Do I need another phone or do I need to reset the phone? Do I need to send it to HTC for repairs?