ES6 introduced several features that significantly enhance JavaScript development, particularly for Vue.js applications, by addressing common coding issues. These features include method definition shorthand, which improves code readability by allowing more succinct function assignments, and destructuring, which simplifies the extraction of properties from objects and enhances clarity in accessing Vue instance properties and scoped slots. Functional array methods like filter and map streamline code by offering concise ways to manipulate arrays, reducing the need for verbose loops. Arrow functions solve the issue of incorrect binding of the "this" keyword within Vue components, ensuring it consistently refers to the Vue instance and enabling more succinct function expressions. The article emphasizes the importance of recognizing code repetition and keeping abreast of language updates to spot opportunities for codebase improvement. Additionally, it suggests that reviewing other developers' code can provide insights into different coding patterns. Tools like LogRocket and Galileo AI are recommended for debugging and monitoring Vue applications to improve user experience by providing detailed session replays and automated issue detection.