There is an interesting side effect here. Salaries throughout EU vary a lot. This will give people chance to better understand the salary differences between countries.
There's no way for candidates to derive the real value from such a complex offer, let alone compare it to other offers. I imagine employers would like to keep it that way.
When comparing across countries, you'll also have to factor in how things are taxed in said countries and what you get in return for those taxes.