I'd go with something easy to transform and hard to break over poseability. Young kids don't have the attention span for many transfomation steps, which then frustrates them. And if they break it (which is more likely with finicky transformation), they complain or toss it aside, which is frustration for you. They often use their imagination to make up for articulation - Rescue Bot Flip Racers are mighty fun despite no purposeful articulation.

It's mostly Camaro style rather than Volkswagen for the simpler toys too.

Any of the "1-step changers" e.g. current Cyberverse.

Anything Rescue Bots [Academy], such as this.

The older Generations Classics Legion class Bee they used to sell at Coles for $7 several years ago was Beetle-like and not hard to transform with fair poseability but harder to obtain.