In terms of graphics performance, the AMD Radeon Pro 5500m ranks #71 in notebook GPUs on Notebook Check!
That's right a measly #71. For the price, Apple is charging I would feel ripped off for anything less than something in the top #5. Apples hardware is an absolute fraud at this stage, a total ripoff!
https://www.notebookcheck.net/Mobile-Graphics-Cards-Benchmark-List.844.0.html
Which is not bad actually. It is just below 1060 (which was descent gaming card actually) and above 1650 and 1060 MaxQ. These cards can be used for gaming, and will have descent performance at FHD resolution.
Anything more powerful is not a good fit for ~2kg chassis.