The Dallas Cowboys have made some notable additions to their 2026 roster over the past week thanks to the NFL Draft and late action in free agency. The team added Ohio State safety Caleb Downs and UCF edge rusher Malachi Lawrence before trading for San Francisco 49ers linebacker Dee Winters. Along with signing two veteran wide receivers in Marquez Valdes-Scantling and Tyler Johnson and linebacker Curtis Robinson, Dallas has brought in multiple draft picks and undrafted rookies to add to an already new-look roster. But despite all of this, Dallas still needs to add more talent to its linebacker room in order for the coaching staff to feel better about the defense headed into the first year under new defensive coordinator Christian Parker. Trading for Winters, signing Robinson and drafting Michigan linebacker Jaishawn Barham is certainly better than where Dallas started the offseason but isn't quite enough.…