If it is just sites and subnets you won't have so much trouble, but you could end up uploading not used sites/subnets.
Example: If your company's network only uses 10.0.0.0/8 and somewhere in AD you get 11.0.0.0/8 or 192.0.0.0/8, this stuff will appear in the console.
Make sure you associate sites with subnets in Site Server Settings so your Site Servers can work correctly with the machines you intend for them to be their Package/Task/Network Boot Server.
Regards.