Yes, I do think that the last 6 or so years for BGW have shown less than stellar attractions.
Europe in the air was a knock-off of the Soarin' attraction at Disney, using a vastly inferior motion system reused from when the theater showed Corkscrew Hill. Maybe it would be kind of cool at a 90s Paramount park, but it feels incredibly dated in 2010 at Busch Gardens. A few years before, they added Darkastle which was admiteddly inspired by Spider-Man, but had its own unique theme and kept the ride tech up to date.
Mach Tower has been a maintainence nightmare. The park didn't buy a proven Intamin tower and instead bought a cheap Italian tower from a company called Moser because of some stupid feud between BGW and Intamin over Escape from Pompeii.
The Verbolten "show building" is, or at least was, very visible and out in the open for public viewing, and it's just a corrugated metal shed. The concrete footers on the "big drop" are absurdly large and ugly for what should be the most picturesque ride at a park that has won more landscaping awards than any others.
You already mentioned Tempesto, which is probably the cheapest addition yet.
Apologies for yet another rant, and I'm taking back my previous comments about wanting an RMC, because they sound quite entitled and whiny in hindsight. I've already said a GCI can be good if they theme it well, like Wodan at Europa. They may have more budget for quality theming if they get a GCI anyway. But I do have reason to be skeptical of the new coaster. because of the declining quality of the Park's attractions over the past few years.