A while ago, I backed the Hammer & Forge kickstarter from Ganesha Games. Part of the rewards was a pdf of the Advanced Song of Blades and Heroes rules. I just downloaded them the other day and started looking through them. So far, it looks like a pretty fun set. I'm not 100% sure I don't still prefer the basic rules for ease of use, but most things are fairly modular and well-explained and the rule sets are pretty compatible. There is also a free handy primer pdf explaining the differences between the rules and how they differ. I recommend checking it out. The pdfs are available on wargamevault.com