As they share the same dimension, is it safe to say Kakashi can warp out people that Obito has warped in and vice a versa.
If so does this deprive Obito of his main asset and skill (not including the Jūbi)
Most likely. I guess it depends where the person is in the dimension. For example the further away Obito was from Kakashi when he warped the person would require Kakashi to have to search for a while in the dimension.
As they share the same dimension, is it safe to say Kakashi can warp out people that Obito has warped in and vice a versa.
If so does this deprive Obito of his main asset and skill (not including the Jūbi)
considering Kakashi has shown capable to warp himself to and from his pocket dimension as well as warping powerful techniques such as Rasengan/Deidara's bombs to the dimension, i see no reason why he wouldn't be able to warp others to and from the dimension as well