Yeah. One sign of asymmetry is that creating two universes, one filled with pleasure and the other filled with pain, feels strongly negative rather than symmetric to us. Another sign is that pain is an internal experience, while our values might refer to the external world (though it's very murky), so the former might be much easier to achieve. Another sign is that in our world it's much easier to create a life filled with pain than a life that fulfills human values.
"one filled with pleasure and the other filled with pain, feels strongly negative rather than symmetric to us"
Comparing pains and pleasures of similar magnitude? People have a tendency not to do this, see the linked thread.
"Another sign is that pain is an internal experience, while our values might refer to the external world (though it's very murky"
You accept pain and risk of pain all the time to pursue various pleasures, desires and goals. Mice will cross electrified surfaces for tastier treats.
If you're going to care about hedonic st...