cAP ac can be run with wifi-qcom-ac driver and does support the latest bennefits.
You really want to read the above link carefully, there are some manual steps to take.
Update the AC to 7.13 and you can manege from the new CAPsMAN like AX.
But if you use VLANs the config will be tricky and complicated because on AC devices the wifi-qcom-ac driver doesn’t support vlan tagging.
You have to create bridge vlan filtering config in this case: https://help.mikrotik.com/docs/display/ROS/WiFi#WiFi-CAPsMAN-CAPVLANconfigurationexample: