I assume you've typoed BCM43… with BCM34… here, so BCM4360 && BCM4331 && BCM4328, all of which are Broadcom softmac wireless cards and which are basically unsupported under OpenWrt (very, very basic support by b43, 54 MBit/s max.), this isn't going to improve in the future either.
If you care about WLAN support, this hardware won't be a good choice for running OpenWrt. The supported Meraki devices use QCA/ Atheros WLAN (for which good WLAN drivers are available) instead of Broadcom.