Bike Packing through Spain help with route choice

I am planning the last leg of a long bikepacking trip to Faro, Portugal. I started in Southern Germany and then went south until I hit the Mediterranean in Italy. Since then, I've been following the coastline to Valencia, where I am now. I am looking to change things up from the coast and am considering taking a more direct path through Castilla la Mancha to see some different landscapes. Does anyone have experience with these routes, or do they have any reason why I should not go through central Spain? It does seem more remote, and places to stay might be trickier, but I have bike repair equipment as well as a gas burner and things to sleep outside if needed. Any advice would be great. I've posted a screenshot of the route.