Gaara is *technically* weaker without Shukaku:
* Raw Power: Shukaku was a powerful tailed beast. It directly boosted Gaara's physical strength, speed, and stamina. This is clearly evident in the difference in his performance before and after Shukaku's removal.
* Sand Manipulation: Shukaku gave Gaara an immense level of control over sand, allowing him to manipulate it in ways that were impossible for him before. This included things like his signature Sand Burial and the ability to create sandstorms.
But Gaara is also stronger in other ways without Shukaku:
* His Own Abilities: Gaara's talent for sand manipulation is undeniably strong, and he has honed his own techniques without relying on Shukaku's power. This means his sand skills are more precise and strategic.
* Mental Health: Shukaku's influence was a constant struggle for Gaara, causing him psychological torment and anger. Without Shukaku, Gaara is mentally stable and can focus on his own strength, leading to more effective decision-making.
* Emotional Growth: The experience of losing Shukaku and finding his own strength through self-reliance and bonds with others has made him a much more mature and compassionate person. This emotional growth translates to a stronger, more resilient character overall.
Automatic Sand Barrier:
* Shukaku's Influence: The automatic sand barrier was a direct result of Shukaku's presence. It was a constant defense against harm, powered by Shukaku's chakra.
* Gaara's Adaptation: While Gaara doesn't have the automatic barrier anymore, he's developed his sand manipulation skills to the point where he can create a similar protective barrier quickly and efficiently whenever he needs it. It's not completely automatic, but it's still a powerful and reliable defensive technique.
In Conclusion:
Gaara is undeniably weaker without Shukaku's raw power, but he's also more skilled, mentally sound, and emotionally stronger. His sand manipulation abilities have progressed considerably, allowing him to overcome the loss of the tailed beast and remain a formidable force. He's stronger than ever in terms of his personal strength and mental resilience.