I would suggest a VBA implementation in Calc would do a lot for getting LO taken more seriously in the business world.

Also bear in mind that Office is a moving target. Office 2016 is due out this year... http://venturebeat.com/2015/01/22/microsoft-announces-office...

This is the wrong question to ask. What blocks people from switching isn't some specific MS Office feature missing in LibreOffice. It's a lack of compelling features in LibreOffice that are not available in competing products to justify the cost of migration.

Both LibreOffice and OpenOffice tend to crash on me. I stopped using them, but my wife still does and they still occasionally crash/hang on her. So in terms of stability I cannot recommend them.

They also just look uglier. I have not looked at this new LO version yet.

I mainly use PowerPoint for science talks. I'd like to use Impress, but it's very buggy. It may be caused by importing PPT(X) files, but parts of slides become randomly uneditable and styles randomly don't work. The PPTX import often randomly breaks.

At least for me, OOXML compatibility is the largest blocker - I have some documents which just won't open correctly with LibreOffice.

Though this is becoming less and less of an issue, I still keep Office 2007 in a virtual machine just to turn them at least into PDFs.

The experience they've grown accustomed to.