But wouldn’t Ford Racing sound even better?

So true, you had to live it to remember the impact Ford made then! The early 80’s as Ford downsized their models they had some (now looking back) real design duds, so when they shifted to emphasize aero design it was so exciting. And Ford brought these looks to mainstream America, capturing a Euro look that us car enthusiasts longed for.  One big moment I remember about the Taurus/Sable debut was that once it was reviewed in magazines, we only then heard about how much of a drivers car it was designed to be. Prior to that it was all about bringing advance design to the mainstream but then to hear how much they benchmarked the Euro brands and then to hear reviews of how great it felt to drive, it was a real moment in time of the era! Finally a mainstream US car with European ride and drive. And every model got to get this, even the most basic Taurus L (which my dad got as a company car in 1986) drove great!  Someone above asked if it tested well…I think Ford was very concerned of such a big change in their lineup that they kept the midsize LTD and Marguis (based on the Fairmount) around as they were concerned of the T/S’s reception. But soon after they saw what I hit it was, and ended those models early. 

Honestly, I've wondered why they don't try Maverick in Europe - seems like it'd be a great product for the smaller roads.   Unless it's the same "F-150 logic" in the early 2000s of not wanting to encroach on Ranger sales.

Why even bother with that? Could just call whatever trim lt is like this:   Mustang Mach 1 tuned by Ford Racing   IMO they don’t need a special name like SVT or SVO to tie it back to Ford Racing 

And North America finally got the type of “Ranger” it wanted back in 2006 when the original T6 kick off meeting began.   Theres a lot to like about Maverick, surprised it took them until the late twenty teens to develop one….although Ford Europe used to jealously guard its C1/C2 product design and development… LOL, guess I answered my own questions…

why?  Mach 5 means nothing, and would confuse people if the 4-door got called Mach 4 (rumored).

Sure, but they're showing part of the development process, and I think this was showing the clay sculpting robots.  I think you're reading way too far into them showing a design development clay model.

SVO (or SVT) can become a Ford Racing derived trim level designation once again denoting that whatever vehicle it is attached to can easily be identified as being one that has received a trip through the "factory hotrod shop" that is Ford Racing..special seats, suspension parts, engine or motor upgrades, wheel options....

I doubt it.  I don’t think they want to pay any more plus I think they just want something new,  Mach 5 has a nice ring to it.