The best thing that can be said about Mitt as governor is that he was better than the alternative. He held back the liberal tide for a while, but now it's too late and the tide is rushing in. Perhaps, after 4 or 8 years of Governor Urkel, some sanity will return to the voters and real conservatism will make a comeback.
I don't see it happening. The intellectual gene pool is getting tighter and tighter. With the exception of financial enclaves, and military and fedgov medical expenditure the future for Mass is Lowell/Lawrence/Holyoke. Mass is a elderly, depopulating state, bringing in tax consuming third world poverty where the largest employer in every town is the town, in every county is the county government. Young, self supporting working class families should, as they are, flee the state, where most of their money goes to support various government pathologies at the expense of their own children.
On the plus side, there are about a dozen of cities in Mass where housing is getting cheaper every year. Kind of like a bunch of mini Detroits. If you are hooked up in the 'revitalizing urban centers' industries there are probably decades of expenditures you can cut off the taxpayers flesh until the whole thing collapses.