Everyone forgot Romain Grosjean was a BEAST at Lotus !

Between 2012 and 2013 Romain Grosjean was among the best drivers in F1, picking up 10 podiums with Lotus. The overtake on Massa during the 2013 Hungarian GP was deemed illegal and Grosjean received a drive-through penalty for leaving the track during the overtake. What do you think about this decision?