Greybark Elm 2006

As I stated in a previous post I have come to believe that this tree was a mistake and the reason for this belief can be seen in the photo below:

You might need to enlarge the photo to see it clearly but the tree has a horrible wound on the top which will not heal nicely for a very long time, the tree also has no taper whatsoever.

My plan with this one is to put it into a bigger pot and grow it on for a bit. This will thicken the trunk and then I may try for a broom style.

Any advice on this plan?