I've seen worse seams, from guys that should know better.
Closing the seam can be tricky or it can be cake, depending on the leather.
Shark and bull-hide are stretchy so they can be massaged into place easily.
Some wraps are pretty stiff and stretch about as well as cardboard.
However, once the glue has been allowed to soak-in, most wraps will become pliable.
There's some good info to be had with a search.
I picked up a good trick from a Scott Gracio post a few yrs ago about 'taping' the seam shut.
Once the seam is closed, taping across it in several places will help in preventing the leather from contracting
and opening the seam as the glue is drying. After 8 hrs, you can remove the tape and the seam stays shut.
I don't use it on every wrap as it's not always needed. It depends on how well the closing went.
Leather wraps are like anything else, the more you do, the better they get.
KJ