First, this aircraft is going to cost as much as the F-22 by the time it’s ready to go. Second, any aircraft that is claimed to replace the A-10 is a fraud.
What's really needed is to design a next generation A-10. the air force is getting 200 pairs of new wings built for the current fleet of A-10's to keep them flying another 20-25 years. The F-35 is too expensive and too fast for the close ground attack role.