I didn't have to jailbreak Kodi on mine. Just downloaded the app. Best thing to do is just add the different add-ons and go through them to see if you like them or not. Then just delete the ones you don't like. I like it because you can get some of the football games that you may not get on your tv package. Pac-12 network is one. I haven't looked for any baseball yet, but I bet there is some on there. And if you don't have NFL Sunday ticket you can get games that your package doesn't include.
Download USTV-Now and you can get your networks. I'm playing around with the idea of cutting the cord and using PS Vue along with Kodi and Amazon Prime and getting everything I need for just the price of PS Vue and the one time $100 a year for Prime.
I've been considering going this same route. My question is can Kodi and all the apps within it completely replace what you would get from PS Vue, Sling, Etc.? Because I've about made up my mind on cord cutting. DTV bill is up to about $140 / month and I'm done doing the "temporary price drop for 2 year contract extension" dance with them. Fire TV or Firestick + Kodi was my first option, but I'd also like a back up because honestly I can see the FCC shutting down the whole Kodi operation very soon because it just seems to good to be true (kinda like Napster, Kazaa, etc). If that happens, I'd like to have a highly functional application like Vue, but if it has some things already that can't be accessed through Kodi then I may just go ahead and do both.
Sidenote, seeing that you are also interested in PS Vue, I have read that navigating the channel line-up is FAR more user friendly on the Fire TV than the Firestick. But, you have to pay $40-$50 more (just one time though). Kodi is accessible on both. Just something to consider.