Overall, the first half of Dustgrave is pretty fun.
Party:
Zheng with Tempest Charged Blade
Pegasus with HMG
Raleigh, standard handcannon build + Howitzer
Emperor, standard build
From a combat perspective:
Bloodsport is great fun, the enemies spreading out helps ease the sheer number of them. Zheng got to have fun being the designated Pyro destroyer. Unfortunately Brutus was a little underwhelming because of the sheer number of wrecks on the field making it hard for him to push through and get to PCs
Magenta Favor was interesting and I think one slight issue with the otherwise fun setup was that with the map I used it meant almost for the first two rounds, only the Peg Smartgun and the Howitzer got a shot off on the enemy. Having some Berserkers start early and leaving the Sentinel as a late reinforcement may be better? Otherwise it's just standard movement for the other players as they watch the Engineer set up.
Elevator Pitch was a fun fight but most of the fighting was concentrated around the lower left quarter, which meant a lot of the map was unused, especially as basically all the enemies prefer to be in close range. Once they stick to the subaltern it's a fight or die situation. I don't know if there's a good way to keep the flavour while changing this, and the players had fun regardless.