while working further I also recognized that the routes are missing in ther VR and that the tags are missing as well. 

for the missing templates parts a did a manual workaround and build my own set commands and the tags could be exported from Expedition as CSV and I transformed them to set commands too. 

I commited this config to Panorama and the Device-Group and then imported this config again to a new project into Expedtion to use it as the base config so I don't have to redo this work everytime again and just need to merge the CP config to it. 

the final exproted could be imported successful as xml config file to panorama and gave no validation erros. 

turned out there was still missing elements from the device-group part of config. Some service-groups were empty and also some address-groups. No idea why, but could be added via CLI quite quickly. 

but still leaves you with a feeling that the output might lack parts of the config