Recently I had a requirement to filter out some of the entities and optionsets while generating early bound classes using CrmSvcUtil.exe. I was almost done writing my custom code for that when my colleague pointed me towards this wonderful tool in codeplex. The link for this tool is available for download from the following codeplex URL – https://xrmearlyboundgenerator.codeplex.com
I am pretty sure that after after using this tool, you would never want to use CRMSvcUtil.exe again
Hope this helps!