I'm a hobby luthier but I have seen a few instruments, I have never seen a saddle angled towards the sound hole, that looks to me to be asking for trouble down the road. I have been putting a sharper top on my saddles adjusting fore and aft for intonation, I haven't decided if the sharper top is a good idea or not.
It looks to me that the top picture saddle is too thin for the slot. There is a gap on the bottom left and top right, and the bottom of the saddle is not flat against the bottom. This causes the angle and may affect the sound without a good firm connection against the bottom or if the saddle can vibrate inside the bridge. You could remove the saddle and make a new one with a blank, sanding it to more precisely fit in the slot unless it was glued in to compensate for the loose fit.
On the same instrument the sloping saddle would effect the intonation. The pressure dynamics may lead to bridge cracking on inferior wood. installing an undertone saddle pick up is asking for trouble. The look is not good.