It's funny to be agreeing with Nick Cook but anything to increase the powers, and more importantly budgetary freedom, of local councils would be a good thing in my view. We have some of the weakest, most oversized and least representative councils in Europe yet they are expected to manage all sorts of important things which impact almost everyone every day - schools, roads, bins, homelessness, air pollution, planning - and in Edinburgh's case, a nationally notable and unique infrastructure project. The idea that a council might have to go begging to the government to build a few metres of cycle lane, to restrict parking on pavements or to levy a tourist tax to fund services would be unthinkable or even unconstitutional in many other places, yet it's a sad reality for the Scottish local authority.
Having said that, I'd be a bit sad if the only achievement I could come up with following a full term as a councillor was (unsuccessfully) opposing road safety measures.