Yes, the work of Syed Ahmad Shaheed Brailvi, Shah Wali Ullah Muhaddis Dhlvi and his sons was the most important factor in the revival of Islam in that period. Anyhow, the services of many scholars,Madrissas and Sufis during that period can't be ignored.
It was essential to follow the moral and spiritual principles of Islam in order to create a good society, whether politics,economics or just tha day-to-day lives of the individual Muslims.
The translation of the Qur'an into Persian was a very important reform, Shah Waliullah believed that the lack of knowledge of the Qur'an and Islam was a major reason for the problems of the Muslims. Translating the Qur'an, he made a large number of Muslims able to understand and follow the Quranic teachings which were vital to the Muslim community. He played a very important role in defeating the Marathas at the Battle of Panipat in 1761. He believed that the Muslims had to unite to deal with this threat, he wrote to all Muslim nobles calling on them to unite and save the Mughal empire. It was partly his influence which made Ahmed Shah Abdali of Persia intervene. Joining the local Muslim leaders, he defeated the Marathas at the Battle of Panipat. His influence continued long after his death, the Madrassa Rahimiya continued to flourish and many future Islamic leaders were inspired by him to fight for the good of the Muslim community.