ds punchers are easiest to build, and 574 has proven their viability, but i have absolute faith that a well driven hood-adjusting/ds flywheel will win worlds at this point, probably alongside a 2bc or second flywheel. expect teams like 9605a and 169 to be at the top of the game. 
Double shot flywheels using software are still viable, I really don’t know why nobody has been talking about them that much.
Skyline has some absolutely amazing flywheels that shoot hard as well as have relatively fast double shots. (Albeit not as insane as 169, but still impressive given another motor isn’t utilized for it).
why havent i seen this reveal yet!!! watch out for skyline! double shot flywheels have been slept on, too op. you point out that these guys dont use another motor, but I would argue that the motor that is used for the hood adjuster on 169 bots is linked to their scraper or some other mechanism.