My last full-time experience with Eclipse was a year and a half ago, and it was worse than it has ever been. Plugins and package management are a nightmare, and that's a quagmire that you can't simply rewrite your way out of. Terrible plugin quality control has created an entire ecosystem of bad Eclipse UI/UX.

As to OSGI -- that has been the core of Eclipse for nearly a decade, and IMO also a big part of the problem. The promise of OSGI was to allow Eclipse to be treated as a radically-open MDI framework that you could write just any old software on -- not just IDEs, but gaming frameworks, spreadsheet editors, on and on. The reality is that the standards for Eclipse's OSGI "drop-in" architecture have not stabilized into a robust ecosystem, rather it has lead to wildly varying user experiences, odd menu/pane/window configurations that have little consistency from one plugin to the next and poor quality software across the board. I'd be very reluctant point to Eclipse as an example of OSGI's fulfilled promise.

Also -- not sure if you read the OP, but the new Android IDE is going to be IntelliJ, not Eclipse.