Many of the abandoned houses in Detroit are owned by speculators who will do nothing with it but wait for land prices to increase.
It has been shown that LVT reduces blight: https://www.pewtrusts.org/en/research-and-analysis/blogs/sta...
Did you mean to post a different source? The one you posted doesn't "show" anything, equivocates on whether LVT actually reduces blight in the few instances where it's been practiced, and makes meaningful suggestions for solutions other than LVT that it indicates have been shown IN PRACTICE to reduce blight (e.g. a land bank).
It's hard to justify telling land owners to pay high property taxes when the city delivered the highest crime rates and worst performing schools in the nation in exchange for those tax dollars.