Wesley's claim to fame was his teaching on being Holy before God.. Washed, cleansed and sanctified. A tradition more outside of the Methodist church than inside.
Specifically, entire sanctification, which was his attempt to translate the Orthodox doctrine of Theosis, which other Protestants including Luther and, surprisingly, Calvin, had also been interested in.. In the West the idea of Theosis in salvation had been displaced by the idea of the Beatifici Vision, but Theosis is a more active kind of glorification.
Unfortunately, you are correct that much of the Methodist church dropped the ball when it came to John Wesley’s teachings, both with regards to Entire Sanctification and the weekly celebration of Holy Communion; additionally it was also the desire of Wesley that the Methodist churches in North America should pray the Great Litany every Wednesday and Friday as part of the Fast, and I don’t know of any that do that (but Epworth Methodist Church in Boise, Idaho has evening prayer on Thursday, and there are a few other Methodist churches using a liturgy closer to the Anglican liturgy beloved by John Wesley).
Also, Wesley was one of the first Anglicans to advocate for weekly celebration and partaking of the Eucharist, anticipating the start of the Anglo-Catholic Oxford Movement of Edward Pusey, John Henry Newman, who later became a Roman Catholic cardinal, and others, by a century. During Wesley’s lifetime it was unusual for most Anglican parishes to celebrate Holy Communion weekly and even more unusual for people to partake of it weekly, other than clergy (indeed, the 18th century was a low point in terms of frequency of communion around the world; John Wesley’s only contemporaries I am aware of in this respect were the Kollyvades Brothers in the Greek Orthodox Church, who were connected with Mount Athos and the Hesychasts, and who advocated for laity in parishes to receive communion and avail themselves of reconciliation at every possible opportunity.*
*I should stress that my knowledge of such movements is limited to the Kollyvades Brothers and the Methodists; I would not be surprised to find high frequency communion existed in some of the Lutheran Orthodox countries contemporary with Wesley, before the onset of Pietism, Rationalism and Crypto-Calvinism, the trifecta that wreaked havoc in the Lutheran churches in Europe in the late 18th and early 19th centuries, and perhaps among the Moravians, notwithstanding the strange pietism of Count Zinzendorf, who was hosting them on his estate in Germany, providing them a haven but introducing his own doctrine some of which is problematic and was recognized by Wesley as such I think when Wesley was assisting a colony of Moravians in North America, although this did not preclude his Aldersgate experience in a Moravian chapel a few years later.
