Why look at the # than the quality of update? I would be doubtful that any RIFT update can the quality of SWTOR's 1.2 update that many said was the biggest non-expansion update any MMO had ever done.
Any MMO can break up a single update into 3-5 pieces and scatter them across months. SWTOR doesn't do it that way. They give us big updates every few months.
RIFT has been out longer than SWTOR and yet all people talk about is the first 6 months. Must have died down after that, like in every other MMO.