Was this suggestion declined? There’s still no mouse tilt (also sometimes known as horizontal scrolling) support in 4.22. In addition, there’s zero support for additional mouse buttons and UMG Input key Selector still does not take the mouse wheel up/down into account. Time for a 2019 facelift?
EDIT: I just checked a top computer parts retailer. Sorting all available mice by “tilt wheel” returned 999+ results, so it’s clearly not a fringe feature anymore.