I have an MR8300 and I am currently using the stable version of the EA8300 but this one has a problem with one of the radio modules ie the CH100 one. Regardless of which country it fits in there is just a functional problem (it remain disable). I enclose below a partial log of the attempted activation of this radio module so that whoever develops this router is aware of the problem.
Sat Jan 16 14:17:32 2021 daemon.notice netifd: radio0 (4910): command failed: Not supported (-95)
Sat Jan 16 14:17:32 2021 user.notice mac80211: Failed command: iw phy phy0 set distance 0
Sat Jan 16 14:17:32 2021 daemon.err hostapd: Configuration file: /var/run/hostapd-phy0.conf
Sat Jan 16 14:17:34 2021 kern.warn kernel: [27965.394588] ath10k_pci 0000:01:00.0: 10.4 wmi init: vdevs: 16 peers: 48 tid: 96
Sat Jan 16 14:17:34 2021 kern.warn kernel: [27965.394636] ath10k_pci 0000:01:00.0: msdu-desc: 2500 skid: 32
Sat Jan 16 14:17:34 2021 kern.info kernel: [27965.449463] ath10k_pci 0000:01:00.0: wmi print 'P 48/48 V 16 K 144 PH 176 T 186 msdu-desc: 2500 sw-crypt: 0 ct-sta: 0'
Sat Jan 16 14:17:34 2021 kern.info kernel: [27965.451083] ath10k_pci 0000:01:00.0: wmi print 'free: 114572 iram: 12804 sram: 29508'
Sat Jan 16 14:17:34 2021 kern.warn kernel: [27965.760516] ath10k_pci 0000:01:00.0: Firmware lacks feature flag indicating a retry limit of > 2 is OK, requested limit: 4
Sat Jan 16 14:17:34 2021 kern.info kernel: [27965.760729] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Sat Jan 16 14:17:34 2021 kern.warn kernel: [27965.774217] ath10k_pci 0000:01:00.0: peer-unmap-event: unknown peer id 0
Sat Jan 16 14:17:34 2021 daemon.notice hostapd: wlan0: INTERFACE-ENABLED
Sat Jan 16 14:17:34 2021 daemon.notice hostapd: wlan0: INTERFACE-DISABLED
Sat Jan 16 14:17:34 2021 daemon.err hostapd: nl80211: Could not configure driver mode
Sat Jan 16 14:17:34 2021 daemon.notice hostapd: nl80211: deinit ifname=wlan0 disabled_11b_rates=0
Sat Jan 16 14:17:34 2021 daemon.err hostapd: nl80211 driver initialization failed.
Sat Jan 16 14:17:34 2021 daemon.notice hostapd: wlan0: interface state UNINITIALIZED->DISABLED
Sat Jan 16 14:17:34 2021 daemon.notice hostapd: wlan0: AP-DISABLED
Sat Jan 16 14:17:34 2021 daemon.notice hostapd: wlan0: CTRL-EVENT-TERMINATING
Sat Jan 16 14:17:34 2021 daemon.err hostapd: hostapd_free_hapd_data: Interface wlan0 wasn't started
Sat Jan 16 14:17:34 2021 daemon.notice netifd: radio0 (4910): WARNING (wireless_add_process): executable path /usr/sbin/wpad does not match process 4143 path ()
Sat Jan 16 14:17:34 2021 daemon.notice netifd: radio0 (4910): Device setup failed: HOSTAPD_START_FAILED
after try to change manually channel
Sat Jan 16 14:25:56 2021 daemon.notice netifd: radio0 (5218): command failed: Not supported (-95)
Sat Jan 16 14:25:56 2021 user.notice mac80211: Failed command: iw phy phy0 set distance 0
Sat Jan 16 14:25:56 2021 daemon.err hostapd: Configuration file: /var/run/hostapd-phy0.conf
Sat Jan 16 14:25:58 2021 kern.warn kernel: [28469.949285] ath10k_pci 0000:01:00.0: 10.4 wmi init: vdevs: 16 peers: 48 tid: 96
Sat Jan 16 14:25:58 2021 kern.warn kernel: [28469.949329] ath10k_pci 0000:01:00.0: msdu-desc: 2500 skid: 32
Sat Jan 16 14:25:58 2021 kern.info kernel: [28470.004145] ath10k_pci 0000:01:00.0: wmi print 'P 48/48 V 16 K 144 PH 176 T 186 msdu-desc: 2500 sw-crypt: 0 ct-sta: 0'
Sat Jan 16 14:25:58 2021 kern.info kernel: [28470.005220] ath10k_pci 0000:01:00.0: wmi print 'free: 114572 iram: 12804 sram: 29508'
Sat Jan 16 14:25:59 2021 kern.warn kernel: [28470.311778] ath10k_pci 0000:01:00.0: Firmware lacks feature flag indicating a retry limit of > 2 is OK, requested limit: 4
Sat Jan 16 14:25:59 2021 kern.info kernel: [28470.313930] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Sat Jan 16 14:25:59 2021 daemon.notice hostapd: wlan0: INTERFACE-ENABLED
Sat Jan 16 14:25:59 2021 kern.warn kernel: [28470.326226] ath10k_pci 0000:01:00.0: peer-unmap-event: unknown peer id 0
Sat Jan 16 14:25:59 2021 daemon.notice hostapd: wlan0: INTERFACE-DISABLED
Sat Jan 16 14:25:59 2021 daemon.err hostapd: nl80211: Could not configure driver mode
Sat Jan 16 14:25:59 2021 daemon.notice hostapd: nl80211: deinit ifname=wlan0 disabled_11b_rates=0
Sat Jan 16 14:25:59 2021 daemon.err hostapd: nl80211 driver initialization failed.
Sat Jan 16 14:25:59 2021 daemon.notice hostapd: wlan0: interface state UNINITIALIZED->DISABLED
Sat Jan 16 14:25:59 2021 daemon.notice hostapd: wlan0: AP-DISABLED
Sat Jan 16 14:25:59 2021 daemon.notice hostapd: wlan0: CTRL-EVENT-TERMINATING
Sat Jan 16 14:25:59 2021 daemon.err hostapd: hostapd_free_hapd_data: Interface wlan0 wasn't started
Sat Jan 16 14:25:59 2021 daemon.notice netifd: radio0 (5218): WARNING (wireless_add_process): executable path /usr/sbin/wpad does not match process 4143 path ()
Sat Jan 16 14:25:59 2021 daemon.notice netifd: radio0 (5218): Device setup failed: HOSTAPD_START_FAILED