What I seemed to notice more than anything is the support structures - especially in helixes having a central column that individual support beams connect the track to instead of freestanding individual support columns at various intervals everywhere as seen on the rest of the ride.
It's surprisingly long for a pretty compact coaster. I've never been a big fan of B&M inverts except in the front row (because elsewhere you can't see, especially inner seat anywhere but the front), but this one looks like it would be fun there.
They'll continue to make them as long as any park buys one. The majority of them were built in North America so there are still plenty of parks worldwide that don't have one. Also, the expansion of their portfolio with the Hyper/Giga, Dive Machine, Winged and Flying coasters ate into the demand for them.