Actually, this rule was not doing what you thought. It was only blocking access to the router because you specified an address (192.168.0.1/24) not a subnet (192.168.0.0/24).
Nope. You don't allow guest > lan forwarding, so your guest network cannot see your lan.
I think that the primary reason it didn't work was related to the device in the network interface stanza... the wireless devices should never be included in the /etc/config/network file, only in the wireless file. And the syntax for the radio definition likely changed, causing the problem you experienced.
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Thanks! 