A few years back older brothers were encouraged to step down as elders and make way for younger ones. These younger ones generally have no clue about the Bible or WT teachings. Ask them a deep question on the Bible or WT teachings and they are like 5 year olds trying to spell a big word. Some enthusiasm but very hit and miss. Usually miss.
It is very easy to confuse these younger ones (elders and the congregation members), this can result in a big sulky silence on their part. If there is any hope, you have to first get them to understand the Bible, in particular Jesus' loving kindness. So the chart could be a helpful way of encouraging them to read the Bible. But you know what they are like - if they are reading the Bible without the Watchtower they worry - cause they've got to do the thinking rather that allow Watchtower to do their thinking.