One questions though. I am getting response from ping 8.8.8.8. and it is going via WAN 2.  ... View more

. In case you just add the new hub to one spoke as primary hub   Spokenew - hub new - hub old - Spoke old And Spoke old - hub old- spoke new ... View more

It need to rebuild all the tunnels from and to the other wan IP, so traffic from spoke will use 2nd hub for some period.   If you dont use dynamic routing on the hub you could use routed mode and use 2 wan interfaces ... View more