Am I right to assume that this mostly affects networks that configured advanced VLAN usage on the switch/LAN ports? Since I only use VLANs on eth2 for WAN, do I need to prepare for big issues when switching to TOS6? (Having configured DSA on a different router I feel the pain, yes DSA clearly is the only available way forward for OpenWrt, but we are still a bit in the rough in the conversion; and the defaults are not as helpful as they should be*).
*) I think that OpenWrt should default to using a VLAN with bridge-vlan-filtering on br-lan, as otherwise anybody splitting up br-lan into different VLANs will run into the issue of loosing access to br-lan when committing the change. But this is probably not the right forum to whine about OpenWrt