There's such a variation in valuation of ROR, the most recent trade of a good young centre was Seguin, ROR is not on that level, but I think it's a good comparison as far as giving up a good roster player ie Edler or Tanev for a good prospect. Maybe some additional pieces of lower value, but the primary 1 for 1 is pretty accurate.
Forsberg trade is not a good example, because he has no history of producing at the NHL.