Did you solve this?

on my machine with preloaded firmware the accelleration was set to 500 mm/s which caused some ugly corners like yours, i set my

DEFAULT_MAX_ACCELERATION to {1500,1500,5,1500}
DEFAULT_ACCELERATION 1000
DEFAULT_RETRACT_ACCELERATION 1000

and

#define DEFAULT_XYJERK 20.0 // (mm/sec)
#define DEFAULT_ZJERK 0.4 // (mm/sec)
#define DEFAULT_EJERK 5.0 // (mm/sec)


this helped a lot, as the machine takes the corner at higher speed, i then get less ooze from the machine slowing down.