Thanks for all the replies!
I haven't had a chance to look at the Throttle Body yet, but there don't seem to be any other symptoms pointing at this being the culprit, idle is great, no issues with acceleration or performance. But the exhaust sure smells rich. I am still wondering about my Fuel Air Ratio Sensor (Primary Heated O2 Sensor). Also, no codes. But I will definitely take a look!
Also, I have not changed my CVT fluid for about 60k miles. I checked the fluid and actually had it tested at one point about 10k miles ago at Blackstone, and they indicated it was still good. However, this is definitely on my list, have to buy the fluid. Definitely NOT buying it up here in Winnipeg, as the dealer literally charges $42/qt (canadian currency, so same as $31 USD). Highway robbery. I will be going with the AISIN ATFNS2 for $8.81/qt Canadian, same as the stuff Nissan sells. I will buy it from Rockauto and have it sent to a border parcel service, and pick up when I'm in the area.
But that being said, I don't think the CVT fluid is the culprit here either, transmission does not seem to be having any issues.
Speaking of CVTs, I almost bought a salvage 2010 from the local insurance auction a couple months ago. $400 plus a tow, only had 115k km on it (70k miles). Engine, Trans, rear diff, driveshaft, and all the other good parts on it. But couldn't convince the wife we needed a derelict vehicle in our yard, and it seems that ours, although high mileage, is in pretty good shape. I may not need a transmission. Hope not! Though if the time comes, it does look like I can get one from the local LKQ for about $700 with a 90 day warranty.