I am giving feedback if it is possible to have the below features.
1. a textbox for AD computer object description 2. ability to select list of defined AD groups to add to the computer object 3. a step to define dhcp or fixed ip address , subnet, gateway, dns1 and dns2 when OSD
For 1 and 2 (and 3 really) you can create all of the custom input that you desire as that's the entire point of UI++. What happens to that input is up to you though. For 1 and 2, that requires interaction with AD and manipulation of an existing computer object. It's never been my intention to include this type of functionality but you can certainly add your own using a script and the ExternalCall action.
For 3, you simply need to set the appropriate TS variables. The main goal of UI++ is to simply set TS variables which are in turn used by the task sequence to perform certain actions.