If you ask the voters to choose between closed lists, they will have five boxes in which to indicate their first choice, second choice, and so on, for the parties. If they vote as they do in Ireland, there will be 25 boxes, or five candidates per party, for a total of 25 candidates. We must certainly not allow voters to fully list their order of preference. This is done in Australia and I don't think it's a good idea. It's not the case in Ireland. People voice their first three or four choices and they do not express an opinion on the rest. Their vote counts in the case of the first three, four or five choices. In almost all instances, this will not have a significant impact on the results.
I do not think this will result in huge ballot papers.