Hi Rene,
There is something I did not understand, general speaking, when we use RIP, do not the interfaces sending the routes to another device, announce themself are the next hop? (same way as with EIGRP) .
For DMVPN Phase 2 output
Spoke2#show ip route rip
1.0.0.0/32 is subnetted, 1 subnets
R 1.1.1.1 [120/1] via 172.16.123.1, 00:00:01, Tunnel0
2.0.0.0/32 is subnetted, 1 subnets
R 2.2.2.2 [120/2] via 172.16.123.2, 00:00:01, Tunnel0
Is showing 172.16.123.2 as the next hop indeed for 2.2.2.2 but metric is still 2, so does not that mean the traffic is still going through the hub??