Just going to share this to all, as I've been asked an interesting question via PM about using 433 as your formation -
It's a formation I thought long and hard about banning outright, as it's VERY tricky to all fit together. But there are a few combinations that can only really work in this formation. So it is available to you all, but I'd also advise sticking to the standard 442 or 4231 variants for less of a headache.