I wonder what went wrong with your brother's batch, because I've used it to make five different meads and so far everything has turned out well (besides the two traditionals, I've made two blueberry melomels and an orange melomel). Granted, I only make one-gallon batches at a time, and I discovered early on just what you pointed out, that it calls for much more honey than is needed (I had to almost double the water to a batch after I added it). For that reason, I don't actually go by how much honey is recommended but by the yeast tolerance and the final ABV I'm looking for, and then I add honey until I get the starting gravity that will get me there, but the rest of the protocol has worked well for someone like me with very little experience at this. To be honest, though, even as a beekeeper, I find mead a lot more expensive to make than wine, and I'm wondering if it makes more sense to use sugar for most of the fermentation and only add some honey toward the end so that I get the flavor and sweetness while keeping down the cost. I'm planning to try a batch just for the experience.