The warning beep is a new bug, hoping they fix it quickly.
It’s normal to veer left for most prop ac. There are a few, not in default msfs, that spin the prop in the other direction, and they would pull to the right. Turn on the rudder assist if your using a mouse, it’ll help.
Haven’t noticed reverse thrust, but it should not be too quick, seems pretty accurate to me.
Tweek your settings, they did adjust some flight characteristics.(for most ac)