The move to WW took prime years out of him. Started out well, then the size difference vs big WW wrestlers became apparent. A bit of a waste, all because the cut was very hard for him. He's a good argument for a 163 or 165 class. There needs to be a place for equal competition for every fighter in the biggest organizations.
He's old for a LW now, 36. Still good, but best days behind him. Though stays in shape, which prolongs his career. But he's not a top contender anymore. Of course, resurgences have happened before, so we'll see.
This was his return to 155. Could be better next time. I'd test that out against Do Bronx or Hooker, as Felder was ranked 7th, so RDA likely gets that spot now, and those 2 are right above. If RDA wants to stay at 155.