Please find the below answers for your queries:1) "Is there any impact having 3 DC's on one cluster & other components on another cluster?"
Ans) There won't be any impact as long as the Ports and Communications are taken care off.
2) Later few months, will be moving the other PM components(DA, PC & DR) to the same cluster. Please let us know if there are any challenges here.
Ans) If there’s no possibility of moving the VM setup to other network, please follow the below steps:
What are the steps to be taken at Data Collector end during Data Aggregator IP changes
Please follow the below tech doc: