Just a few days ago, the Celtics were done.The years of stockpiling assets in order to land Anthony Davis were all for naught. Boston was forced to prepare for life without Kyrie Irving and Al Horford. Dreams of running the Eastern Conference for the next decade had been destroyed. Ainge’s plan went sideways, but maybe that’s a good thing.The Walker signing allows the Celtics to stay the course with a retool instead of a full rebuild. They aren’t that far away, and a positive environment could do wonders for this team’s confidence.Walker’s decision to don the green and white keeps the Celtics on track. They aren’t done just yet. NBA FREE AGENCY TRACKER: List of signings, best available playersBut Celtics president of basketball operations Danny Ainge refused to stay down. He quickly shifted his focus to Kemba Walker, an All-Star point guard who significantly softens the blow of losing two key starters and keeps the Celtics in the East conversation.While Walker isn’t quite at Irving’s production and efficiency levels, the drop-off isn’t that drastic. Walker will immediately be able to make an impact offensively in Brad Steven’s system. He’s coming off his best season as a pro, averaging 25.6 points and 5.9 assists in all 82 games. He compares favorably to Irving over the past three seasons despite playing on far worse teams.Player comparison (2016-19)Kyrie IrvingKemba WalkerPoints per game24.523.7Assists per game6.05.7Rebounds per game4.03.8Field goal %48.343.63-point %40.337.8Free throw %89.185.2Steals per game1.31.2Games played199241Walker may not possess Irving’s overall talent, but he brings less baggage. For the Celtics, the tradeoff is worth it.The dysfunction in the Celtics’ locker room last season may not have been entirely Irving’s fault, but he certainly gets the lion’s share of the blame. His moodiness and inability to connect with his younger teammates created a culture of distrust. His odd leadership methods backfired. He called out others through the media. When Irving did a 180 on his intentions to re-sign with the Celtics this summer, everyone sensed his lack of commitment.The Celtics don’t have to worry about those kinds of issues with Walker running the show. He’s respected throughout the league, and his personality will be a better fit within the Celtics organization. He’ll bring stability to a franchise trying to regain the magic of the 2017-18 season.Despite the Walker signing, the future of the Celtics remains up in the air based on a few factors he can’t completely control. Jayson Tatum regressed as an NBA sophomore, Jaylen Brown struggled mightily for a good portion of the season and Gordon Hayward was a shell of the All-Star player we saw in Utah.But remember, Tatum is only 21 years old. He has all the tools to become a franchise player. Brown went through a terrible slump midway through the season, but he still showed flashes of his potential. (Some analysts believe he may have a brighter future ahead of him than Tatum.) It’s possible Hayward becomes more comfortable after fully recovering from his horrific injury. Marcus Smart will do Marcus Smart things.Walker, emerging from a situation in Charlotte that gave him no chance of competing for championships, is all too ready to join this group. He’s hungry to be part of a winner.