My experience is that hap ac2 with IPQ-4019@716MHz and 256MB RAM(early bonus version) can’t handle 500M/250M FTTH PPPoE clent without Fasttrack.
Although the ac2’s temperature is ok, it is high loading about ~99% without Fasttrack on RouterOS v7 during wired(cat.6) full speed test.
High CPU loading causes the bandwidth drops to about 300M~400M of downloading and increases latency.
Most on-line games work with small packets, and the small packet rate depends on CPU.
This is what I expect to AX2 with IPQ-6010.
AX2 should be a compact high performance router with WIFI 6, and it should not just be like an AC2 upgrading to WIFI 6.