ES6 modules has certainly made Meteor much more complicated, but it’s for the better in the long run. Though what’s missing now are things that would make it easier to work with ES6 modules. e.g. auto-import functionality. It would be great if there was an IDE that could allow you to easily import a required module (just right click on the unresolved variable), which is what Visual Studio has had for C# for years. Visual Studio even knows which imports are unnecessary that you can remove.
More generally, what’s missing from JavaScript / ECMAScript is a fix for imprecise decimal arithmetic. e.g. they need to make 0.1 + 0.2 equal exactly 0.3. The imprecise arithmetic makes programming for monetary / financial / e-commerce applications much more tedious and laborious. The problem was fixed in Java and .NET around a decade ago (with the BigDecimal and decimal data types). Is it ever going to be fixed in JavaScript / ECMAScript? It’s obvious that apps that do monetary calculations will continue to grow into the future. Instead a lot of time has been spent on trying to make code syntax a bit shorter, which is OK but (arguably) not as important. Maybe it’s just too difficult to make 0.1 + 0.2 equal exactly 0.3.