If it's not something complicated and that will make you spend a lot more of your time. It looks like a good graph to me.
This allows you to understand a little better how merits are distributed.
I would say that if it doesn't take up too much of your time during the process of drawing up your reports you could include it, the counting of the percentage of merits gives a more accurate overview of how the merits are spent on the forum and it is an excellent report
It's not really matter of taking much of my time (at this point after making so many of those in the last 3 and a half years it doesn't take me much time at all) but more about not having too many charts so people get bored and overvwhelmed with it. For that reason I removed "posts per user" chart after intitially adding it as I though it didn't bring much but I think that "percebtage of merited posts" actually helps with getting a clearer picture of merit situation in local boards.
I actually think I was the one originally asking to add that column on your dashboard I used to produce this graph
Might be, my memory is not what it used to be.

Also in June the Romanian board was rocking!
Romanian board usually has very high merit/post ratio so I wasn't surprised when I saw them at the top. Then again, these less active boards can have big amplitudes so it will be interesting to see next month's overview.
Anyway, I think I will include this chart in my regular setup from next month's overview and will see how it goes. Though, it started as a brief monthly overview and I would like to keep it somewhat brief (maybe its already too late for that

)