Well at least I am not the only one noticing, thanks Frozenpets..
I understand the RNG factor, but up until the last patch or so, it didn't seem so bad. I wasn't having to farm hours upon hours to get a rare, especially on mobs that are common spawn in an area and common as secondaries. Before it seemed you would frequently run across rares as secondaries, even if you didn't need it.
I can now clear a zone 2 times or so without seeing a single rare or anything, so it seems the rates were dropped. RNG is based on a percentage chance for a mob to populate as a rare. It seems as if this was dropped.
And yeah, I am trying to get my remaining uncommons to rare before they implement more battle pet changes. I also figured that as more people get to leveling their pets into the expansion, there is bound to be more competition. I would use stones, but they are hard to come by, and I want to save them mainly for pets that I cannot work on capturing a rare.
I suppose it give me something to do