Server Folder Preview Icon

So, we recently got the opportunity to make server folders, but i've immediately noticed something that disappointing (atleast for me), i'm talking about their contents preview icon.
When you make a new folder, it's icon is simply made using a reduced sized of the server icons contained in it (reduced by 50%), that means that you get enough space for four icons for each folder, with a minimum of 2 icons (with a black space on the bottom), and four (filling every place), everything ok until you make a folder with five or more servers, as the preview would not tell you that this folder contains more servers, i would suggest to replace the fourth server icon in the folder preview/icon with a +N with the unshown servers, but only if you got more than four servers, so, if you got 8 servers in a folder is would show: Server 1, Server 2, Server 3, +5, so that simply tells you how many servers are contained in it.
Also including a simple image to show what i mean (how it is currently - what i think it should be), ofc this is just for the concept.