Quite simply, the reason for the "new" threshold is political. It is a good way for politicians to show their constituents that they are holding those spending taxpayer funds accountable. It's unclear how this reduces waste and streamlines the process, but it should ensure a reduction in fraud and abuse.
Also, UWide contracts will eliminate the need to find multiple price comparisons.
We have to implement this change as of July 1, 2016 so we will spend the remaining months determining how to implement these changes.