Just a comment here based on the training I received at Front Sight in Nevada. The instructors there recommend that the holster be without cant when worn on the hip. I carry my Sig 229 in a Fobus roto holster which allows setting the cant to suit.
The reasoning the instructors provided is that with a vertical draw, your pistol is closer to the "present" position" which has the muzzle pointing at the target. Drawing the pistol from the canted position, you need to rotate the muzzle forward to bring the muzzle to the present position pointing towards the target. I can see their point and I plan to experiment with it to see if it improves my handling. Currently, my Fobus roto paddle holster is set to a forward cant as in your photo. To me it helps in concealment.
Ralph