Not a fan of the idea generally (splitting the game like this seems dangerous to the health of the community), however:
If there was to be a 'simplified' loadout then we should keep most of the game fundamentals and remove the more specialised or micro heavy plants. The idea should be to present a taste of the game with a genuinely simpler experience, but preserving the main game dynamics and enticing the user to move up to experience all the awesomeness that the full ZK offers.
I think the above suggestion fails to do that - it's more like a 'fun' play style for experienced players who prefer not to play with certain units, rather than something to actually help introduce newbs to the game.
So, I'd suggest the following:
Shield bots, Light Vehicles and Planes only.
No strider hub or supers, but retain nukes.
No energy-powered defences (Behe, Anni).
Some notes:
"Air" as a dynamic is pretty easy to grasp, and central to the wider game, so removing it entirely is unhelpful to newbies. Removing gunships makes sense - they're more like normal units that fly and require heavier AA. That leaves planes that have more natural counters.
Heavy and jumpies requires micro to play effectively, similarly cloakies and hovers rely a bit more on good unit knowledge and using their abilities effectively.
When it comes to supers, nukes are the most straight-forward, and there needs to be some sort of end-game option. Nukes are by far the best option to introduce newbs to supers.
Leaving out the energy-powered defences stops things getting porcy, as well as cutting out the learning curve of connecting the energy grid and building sufficient power.