There is jitter starting at hop 5. That would be the CMTS router at Comcast's hubsite. Otherwise, your pings in that traceroute are reasonable for an online game. You say you are getting up to 220ms pings sometimes. That's a massive amount of delay if your normal ping is around 60ms. If your problem is related to network trouble, it is hard to tell you with certainty where your cause is from that traceroute. A few traceroutes when your ping is spiking badly would be more helpful.

Cable ISPs with coax to the premise are particularly susceptible to upstream RF interference and often that interference is intermittent. It is possible something is causing major interference between your home and your node only part of the time. Again, a traceroute during the severe ping spikes would reveal more. If there is intermittent interference in the upstream stacks, people in your ISP's back office probably already know and have been trying to track down the interference when it happens. Often times it can take days or even weeks to find the source in your neighbourhood if it doesn't last for at least a few hours straight. Among many possibilities for higher than usual pings between your home and your cable ISP is electrical interference getting onto the line. This type of interference is often too weak to trap for the ISP most of the time but can still cause slightly higher pings to your headend. Electrical noise can also get way worse occasionally, even severe enough to cause connection problems. Your ISP will get a warning about it when it is bad but then the electrical interference will suddenly get so weak that it is hard to see again for hours. Similarly, intermittent commonpath interference could be happening from a poor connection somewhere between your home and the node. Like any wire with a poor connection, it will usually appear to be fine but when bumped, the problem shows up. These can be hard to track down also.

Those are just a couple of possibilities that can cause ping spikes and overall worse packet delay assuming that the issue is between your home and your node which that traceroute would suggest. If you are not using Wi-Fi you should see no more than 3ms jitter to the CMTS if your line is clean. Most of the time, if your connection to the node is intermittently poor and a service call technician can't find it at your premise, it is noise leaking in elsewhere in the field and then it is unfortunately a waiting game for the maintenance crew to track it down. In the worst case scenario, Comcast should have some of their maintenance technicians doing periodic sweeps of the plant for physical issues that cause various impairments and they will eventually find the problem that way and correct it.

Do you know anyone who you can go visit and play FFXIV with? If your game performs well at their house then you know your ISP is having trouble in your neighbourhood. It would also eliminate the possibility that it could be something to do with your computer.

Again, all of this is assuming you are not using Wi-Fi. Wi-Fi interference can make online gaming very problematic. Even good Wi-Fi connections have more jitter than wired connections.