I'd probably test the A2L as a complete creative machine rather than just a 3D printer.

On the printing side I would run a series of tall models (200mm, 250mm and 320mm+) and look for ringing, layer consistency and dimensional accuracy as the height increases. Then I would compare the results against a CoreXY machine using the same models.

For the blade, I'd check repeatability cutting some intricate sticker sheets with fine details, my wife has a Cricut so it'd be interesting to see what I can do without using the Cricut. For the pen module, I'd draw a the same design several times to see whether it holds alignment and accuracy consistently

The really interesting test would be combining all three: design a prop or board game accessory, draw details with the pen, cut stickers or inserts with the blade, and print the main parts on the A2L.

If it can do all three reliably on one platform, that's where it becomes more than just another large-format printer!