If you're using a language that (practically) requires an IDE, or, you really want what the modern idea of IDE is. You probably want to look elsewhere.
That, or grok that Unix is the IDE. Vim is just the editor component.
There's plenty of middle ground to stand on. By choosing vim alone, you already deviated from Unix purism (rabid Unix purists aren't that happy with bog-standard vi, either).
Saving round-trips to she shell ain't necessarily evil. Separate unix tools are great, but e.g. presenting info in the editor is quite helpful. Ctags does your parsing, but you can display it with tagbar. Language-specific tools do linting, but you can display it in the editor with syntastic…
You are absolutely correct. I started to use Vim as main editor (Around 6 Month) only after realizing the easiness of its command based editing, not looking after its plugins. I tried to explain that in the blog summary portion. Then why we need all those plugins ?. It just add extra features, who don't like it ?
That, or grok that Unix is the IDE. Vim is just the editor component.