It sounds like you have it pretty much worked out, we don't cut our own Haylage we buy it in, the farmer cuts twice a year three if he's lucky and stores alot... It tends to be dry and brown towards end of the year. Back end of the year its beautifull and kinda yeasty smelling. I love the smell of it, if I was a horse I imagine it would be like smelling beer brewing its kind that kind of fermented smell. I found this interesting article on Hay or Haylage Dodson & Horrell - Hay or Haylage for my Horse
People can go silly with feeding, I have one or two girlies that have a row of lotions and potions and feeding time is more like a chemistry experiment than feeding.. a pinch or this a dash of that, this oil those pellets... lol and it go's on and on and costs them a fortune and my horses on their plain ol Hay or Haylage depending on what I can get and their Oats all look as good as theirs.