I took this from the parrying thread and thought it needs some more discussion.
"Less confrontationally, if you absolutely *must* soften things because of whatever reasons, make the Shove action work like this "one success = pushed to Near distance. Two (or three if two isn't enough) successes = knocked prone instead." Would make it so a small shove, or one that was mostly defended against, cause the target to back peddle, but keep their balance. A solid shove/trip would be required to actually knock someone prone"
Just ran a session last night where 3 PCs took on a minotaur. They won easily but the thing that stood was one PC shoved the Minotaur. With only one success he was able to knock prone a mobster twice his size and strength. Afterwards we decided that I should require more successes for success due to size but the above modification also has some appeal.