Interestingly, we have already had an experiment to address this issue, in the U.S.
Originally all city councils were elected as representatives of wards into which the cities were divided. Tammany Hall, of course, became a watchword for political corruption with its control of the wards through the various bosses, but most cities had some difficulties with power games and setting ward boundaries.
In the middle of the 20th century, a number of cities chose to reform their politics by abolishing wards as political entities and electing all councilpersons “at large,” so that a general election was held and the top x vote getters became the city council, without repect to the districts or wards where they lived.
Whether this has actually resulted in fairer politics at the city level is, of course, a matter of debate. Some cities have returned to the ward system in order to restore representative government while other cities with wards continue to look at a change to the “at large” system, so there is no clear consensus among the body politic.
However, one aspect of the origins of the “at large” system is interesting to contemplate: the first great swell of cities abandoning the ward system occurred in the South at a time when it appeared that blacks would get the vote and use it to obtain representation on the councils. In cities with a 40 percent black minority, moving to the “at large” system allowed the 60% white voting population to provide enough votes across the city to ensure that few or no blacks got elected. (This backfired, later, of course, when enough white flight gave the majority votes to blacks, but I find the original intent interesting to consider.)