The old scheme also just doesn't work as well on the modern, more streamlined buses as it did on the RTSes, Orion V's, C40LFs etc etc.
This straight across front stripe painted over 6 different creases or indents with super tiny front numbers so they fit on that one panel while also still aligning on the blue stripe just looks extremely tacky (it's likely trying to paint an ACS-64 in the same livery as an AEM-7. It just doesn't work.
And don't get me started on the LFSes with the straight front stripe that gets cut off by the windshield...