I agree with this. I would also suggest of adding an easier way of enabling or disabling naval battles in port so that you don't have to load the clan tab every time you toggle it. (PS. The reason why I want to disable my naval battles from time to time, in case you're asking, is so that I can play the ships that I'm not too comfortable of playing without wasting my attempts)
I think this might give too much advantage on clans that has more members cuz not only they already have more attempts with more members but now its going to be even more amplified.
I think this will make it too easy to get to the criteria. Maybe there could be separate criteria for that mode instead.