By Avi Creditor Few clear and obvious questions remain about the U.S.’s World Cup squad, and two upcoming Nations League games will be used to help find solutions. The U.S. men’s national team may be kicking off a title defense Friday night, but you’d have to forgive most for viewing its Concacaf Nations League matches in a different light. The 2022 World Cup is overshadowing and coloring everything the U.S. does, from club performances and moves to national team games between now and the conclusion of the U.S.’s run in Qatar later this year. Gregg Berhalter has spent his time as manager culti…