I recall when Novus was being developed I was GMing Hero system. Tim and I chatted a lot about the good aspects of that game that could be incorporated (the combat moves for example). One of the things Hero does well is give a lift/throw based on your stat value. The reason I suggested it being based on your characters weight was because in a FRPG a Halfling might weigh 60lbs and a Dwarf 150lbs. So, the variance between the "mighty" and the "meek" are almost built in already. Your potion of "Ogre" strength could be reinterpreted to give the effective strength of a 600lb (listed as 500-700lbs) being. So, a TN 15 Athletics Roll might give that PC a lift of 300lbs? Size does matter- and I know Tim had started to address it in some of the monster making Libram Novus rules.
I personally am not a fan of stat values. Novus 2 (whenever that happens) is eliminating them. However, while they are present I would use them to break a tie in initiative for example. Also, one of the ideas I was tossing around yesterday after typing this was to use them as the TN for actions against NPCs/Monsters/players. At least this makes them relevant in gameplay. One of the games I GM is MiniSix and the spell casting TNs etc are often vs. Defense+10 etc. Defense is basically the pip value of your dice pool- so, you can look at a foe with 2d in Wits and know that the TN is 6+10=16. While a better foe with 3d would be 19 etc.
For example, you are trying use trickery to palm a coin from a table; this could be Trickery vs. Stat Value+10. So, vs. an average human (stat value 10) the TN would be 20. In the case of your arm wrestle your Athletics (or whatever) would be rolled vs. your opponents stat value, and theirs against your inflated Ogre STR value.