Of course, you can submit a request for any additional feature which you think should be added to our extensions. To do this, just post a new topic in according extension discussion of Plumrocket Magento Forum. You can also request a new Magento extension. If our team finds your idea useful - we will add it!
In case you don't want to wait, you can always request a free quote from Plumrocket Sales Team for custom Magento development.