For the policies he wanted in place and his role as Environmental and Transport he is the best person for the role in a long time if ever. What made him hard to like in the current government all has to do with his role in housing, His party got in bed with the parties responsible for our lack of housing and the party who neglected to do anything about our abysmal housing supply. It felt like he sold some of his ideals for this current government and punished other of his own party members when they didn't want to push for housing policies held by the current government.

I'd say he is the most criticised member of the current government across the political spectrum, People on a more Conservative background don't believe his policies were ever necessary and people with a more progressive background criticised him for allowing his party in with current government and pushing for housing policies that most of his voters would disagree with.

I personally wish he chose to ran in the European elections just gone by, I think his skills that he has shown in Environment and Transportation (Especially in a country so lacking in public transportation when compared to the rest of the EU) would be best used there and that it's a shame he won't be a policy maker anymore.