Good Morning, 

Thank you for contacting the U of M Extension Service. 

We are volunteers who answer yard and garden questions online. I am not familiar with the Arboretum experience with these hybird oaks. 

Here is a link from the Morton Arboretum on columnar oaks: https://mortonarb.org/search/?page_number=1&search_string=columnar%20oaks&from_back

Here is a link to Crimson Spire Oak: https://mortonarb.org/plant-and-protect/trees-and-plants/crimson-spire-oak/#overview

Here is a link from U of M Forestry: https://trees.umn.edu/white-oak-quercus-alba

If you scroll down, they mention the hybrids you are considering. They discuss the potential diseases but do not address the central leader dying. 

Here is another link with the history of the hybrid: https://landscapeplants.oregonstate.edu/plants/quercus-bimundorum-crimson-spire

You might consider contacting a certified arborist: https://extension.umn.edu/planting-and-growing-guides/how-hire-tree-care-professional 

Good Luck!