FCA's QA is what it is, as is their dealer network. I'll give you my checklist.
1) Do you find the renegade REALLY compelling? No? You should probably buy something else.
2) Do you have multiple dealers within a 45 minute drive? No? You should buy something else. (This applies to all makes, but definitely applies to KIA, Hyundai, all the FCA brands, and all the GM brands to a large degree.)
3) Are you prepared to find 2 warranty issues with your car and make at least 2 trips to the dealer for each? That's statistically the middle of the bell curve for FCA. They may not be major, but time and effort is time and effort, and if you want to make zero of each, I'd go toyota or honda the former has measurably less defects per vehicle than everyone else, the latter has the most stringent expectations for their dealer network.
4) The ZF 9 transmission will never not be weird, and making it live in an offroad truck-like experience is pushing it to one end of it's comfort zone of performance. As of ~Feb/March, I'm of the opinion that FCA is capable of pushing out a pretty decent set of firmware for the drivetrain in terms of perceived transmission behavior and fuel economy impact of better shifting. However, various other fixes seem to be moving them off of that sweet spot. Other things like the long 4->5/5->4 shifts are never going away as it is due to the physical layout of the transmission. Test drive it, more than the 15 minute drive along with the sales drone. If you think the shifting is weird, don't buy it.
5) Read the 30mph noise thread here:
http://www.jeeprenegadeforum.com/forum/434-problems-issues/28737-grinding-rumble-noise-30mph.html This is an ongoing problem for 2015 and 2016 models, and there is no reason to think it doesn't affect 2017s as well. FCA still hasn't figured out how to fix it. If this is a deal killer for you, you should not buy it. The more I learn baout the renegades TC, AWD, etc. the more I'm thinking TC should default to off unless you put it in a specific mode (TC leaves you with ESC on, which is more important for safety and control).
Outside of 4 and 5, I think most of the issues come down to the electronics and a combination of QA/QC on the vendors supplying them and versioning control of firmware within your vehicle (i.e. a combo of FCA making sure there is a top to bottom set of firmware your vehicle is happy with available when they publish a fix AND how good your dealer is as ensuring you have a whole maximally compatible set).