Multiple reasons I'm sure. Why they went to a more flat takeoff could have been simply one Boss to the next changing it up and/or timing reasons for the show. A steep takeoff gets the Diamond slow and close to the crowd as they clear. The Solos would then takeoff leaving a gap in time after the last Solo until the Diamond is back. The current show profile is so incredibly fast that there's hardly any "gap" between two maneuvers. The Boss needs to keep his potential energy high as well as enough distance to accelerate back inbound again. A steep takeoff wouldn't really allow for that tight of a show. Again, I'm just elaborating, but that could be one of many reasons...
Speaking of distance, "Hollywood" whiffers around 2-3nm from show center on the most "stretched" setups. With the Thunderbirds typically owning the airspace within a 5nm radius and up to 15K, he effectively only uses half of that in both horizontal and vertical distance from the crowd. Keepin' the show tight!
The quickness of today's show is what impresses me the most, even more than tight formations! This wasn't always the case with the Thunderbirds, but as far as their spacing goes nowadays, they are only approved to fly "stage 1" tight formations with no wing overlap. This is above the Boss' head and political to a high degree. Back in the nineties and early this decade they were approved for "stage 2" formations based on their show performance and grades throughout the year and it was the OpsO's call with the Boss. Not anymore...
Although, I have to applaud "Hollywood" for what he's done to the show without being granted "stage 2". It is so quick and action packed, that it pushes the Solos to the limits on being able to always be on time and manage to call clear before "Hollywood" is back. ~S!
