I just had a shower thought... remember the strangely pervasive "Giga Dive" rumour that was thrown around before this coaster was announced? If this same layout was featured on a Dive Machine, with a few modifications accordingly, it would have been seen as one heck of a coaster. Since
@Hyde above here helpfully provided a picture with every element numbered, let's go through it in detail and give it a hypothetical design change:
1. Lift hill. Keep the height, keep the lift angle, but make the drop vertical with a holding brake on top. The transition into the next hill would have to be kept, though, for G-force reasons.
2. First hill. This one could be kept as-is (wonder how that would feel with such a wide train) or converted into a zero-G roll of sorts. Not following up the first drop with a turnaround would be a first for a Dive Machine, if I recall correctly.
3. Turnaround. Make it a Dive Loop or Immelmann, which frankly wouldn't require much modification.
4. Speed hill. Keep as-is.
5. Airtime hill. Either have a (second?) zero-G roll here, build an MCBR for capacity shenanigans, or keep as-is.
6. Helix. Convert into second Immelmann/Dive Loop, or even keep as-is unless nothing else is changed from Orion's current layout.
7. Turn into brakes. Could be kept as-is,.
8. Final brakes. At this point, in reality the coaster feels pretty short for a Giga, because we're used to big coasters having lots of elements. But Dive Machines are typically a heck of a lot shorter than this and contain few elements, so DM Orion would feel like a really long ride. It would easily have got away with putting the end brakes here, even in the eyes of picky enthusiasts.
Orion as a Dive Machine would have had a unique layout, but not an outlandish one - after all, it's mostly the one they are building right now. It would be a whole new way to do a coaster type that mostly has stuck to the conventions established by Sheikra back in 2006, while also avoiding comparisons to Fury 325 or Leviathan (if anything, it could be compared to Baron 1898 on horse steroids). Maybe building it as a Dive Machine would put some limitations on the layout (crossing over/under its own track, for instance, because the required clearance is so big), but I think B&M could have made it work.
Strange to see that a layout that feels so minimal and run-of-the-mill for one coaster type, could be so unique and exciting for another. Now I almost want to build it in Planet Coaster or something and see what it could have been like.