I would agree that you are not a good candidate because you have very puffy fat pads. These are probably genetic and tear trough treatment would only make them worse. I recommend a consult with a plastic surgeon for this area.
No, the Tyndall effect is the appearance of whiteish discoloration in the injection area. What you describe is simply a vessel that was poked by the needle, which causes a bruise. Everybody reacts to this differently and at this point all you can really do is cover it with makeup and wait till the bruise goes away.
Yes, you can have more composite placed to correct the spacing, or if that is not a good option, the space can be filled with lip filler to plump up the space and remove the triangle.
Your dentist is right, you need to place the graft in the socket immediately after the tooth removal. If you wait, the bone will dissolve away and you will have a gum defect that will be very hard to repair.
If you are talking about orthodontically moving teeth into grafted bone, I wouldn't recommend it, but that is a better question for an orthodontist.
