The most important thing the Washington Nationals should focus on this winter is building a more competitive major league roster.

After solidifying things on the farm through coaching staff and developmental staff hires, the new front office, led by president of baseball operations Paul Toboni, brought in an influx of new talent . But after overachieving on the MLB diamond compared to preseason expectations , it's time for Toboni and the other decision makers to put their attention on improving the big league ballclub.

Part of that involves creating organizational depth with players ready to contribute in case players get hurt or underachieve.…