They have brought in Khwan Fore a graduate transfer from Richmond on an official visit and right now it seems at PG he is their preference for 2018 class. He is having to decide if coming to Tennessee in a reserve role on a Top 15 team is what he wants, or if going to a ETSU/UAB and getting 30mpg but maybe no NCAAT trip is what he wants. Vols seem willing to wait on his decision, which I would expect sometime soon, if he goes elsewhere I would expect them to continue to explore grad transfer PG market.
As for the other spot, all signs point to Rivals Top 100 big man reclassifying into 2018 and joining the Volunteers. Now some people are going to say Barnes had no plan and this is him grasping at straws, but Barnes and staff have been recruiting Burns for 2+ years, I would say its pretty likely they knew all along him reclassifying was a possibility.