ASUS RT-AC86U Antenna Upgrade / ai mesh

Hi, so I have a RT-AC86U which is currently plugged into coaxial cable in my kitchen on the ground floor directly beneath my room, this is the most efficient place I can have my router as I'm limited by the cable length so not much option to move it around or upstairs. So the wifi signal has to go through a concrete floor before reaching my ps4 pro (6/7m apart). Yet I'm still getting latency and especially upload lag.

I was wondering if upgrading the three antennas on the RT-86U will make...

ASUS RT-AC86U Antenna Upgrade / ai mesh