Both of these are great tips in general. I was thinking you meant there were other means similar to FP, but guess that was wishful thinking. It's been many years since I've been back, but what we'd do was always go in late Sept, and we always got to the park at opening, or "rope drop". I hear they don't really do rope drop anymore, but I'd always intend to be there first thing. Riding rides during parades is a must... always! We'd stop to watch Wishes though. That was our favorite, but immediately after that, dart over to HM.
The couple trips we took, we rarely stayed until close, but that is another great time.
The only issue with these suggestions is that it leaves vast periods of time when there are long lines to wait in. I'd have to think that if they added a paid FP option, I'd always opt for that. No question. I don't think it's fair to those who can't afford it, but to me it'd be a no-brainer if offered.