Complex sentence: Despite having limited international experience, van Ass was appointed coach of the national team in June 2010, after Michel van den Heuvel was let go and in favor of Marc Lammers or another international top coach.
Split into simpler sentences: Despite having limited international experience, van Ass was appointed coach of the national team in June 2010, after Michel van den Heuvel was let go. The appointment came as a surprise: van Ass got the position in favor of Marc Lammers or another international top coach.