It's pretty easy to add yourself: Go edit Grid/GridLayoutLayouts.lua and add
GridLayout:AddLayout("Feral 25 ", {
[1] = {
groupFilter = "1,2,3,4,5",
unitsPerColumn = nil,
},
})
GridLayout:AddLayout("Feral 10 ", {
[1] = {
groupFilter = "1,2",
unitsPerColumn = nil,
},
})
Say, around line 13 (before the first line that starts with "GridLayout:AddLayout"). Those are then for 25 and 10 man, if you want that for different group sizes, just add the same thing, replace "Feral 10" by another unique name, and change "groupFilter" to the right number of groups. If that's troubling, send me a PM
