Just an outsider suggestion here... this is set to kick-off in the brief span between Ep 7 and 8 right? After the First Order essentially blows up the republic in the Hosnian system and the Jedi order has been wiped out twice in as many generations (first the old order, and then Luke's new one) and the galaxy is going down fecal creek in a canoe without a paddle?
Wouldn't this be an excellent time for remaining old school masters to have a good long hard think about their priorities? Follow the old traditions to the letter, or focus on doing something about the situation at hand? This needn't be rushing out in an all-out war (the last time that ended quite badly for the Jedi), but sitting on the sidelines sticking to Jedi minutia could be at least as conflict worthy as rushing into battle. Take the situation with Korrath and Ro'ka for example. Isn't that an excellent conundrum for Jedi master? Ro'ka could be a great force for good, or just against the First Order, but simply laying down the law on her what she can and can't do doesn't seem to work. Following the Jedi code to the letter, Korrath might well be expected to try to stop her with force for what she's done already, regardless if that's a suicidal fight to jump into because there is no death, only the force amirite? Tolerating her behaviour and gently nudging her towards the light (or just pointing her towards the bad guys) however could probably rack up some "knowing inaction"-conflict along the way but could end up being a net positive for the galaxy... at the cost of Korrath compromising his ideals a bit. Essentially, it's a dilemma that forces him to bend or break which is probably the most interesting challenge you can put before such high powered characters (IMO).
These Jedi masters already seem to have all the answers so, IMO, they need to be put in situations where there is no 100% right answer. Being forced to cooperate with darksiders or being ground to dust beneath the FO war machine seems to be an ideal situation for this, when being a by-the-book, uncompromising Jedi is impossible or suicidal.
Of course "suicidal" is a perfectly valid option here. Ask Master Skywalker. ?
Well, just my two cents. Lurking here has been, if nothing else, educational and inspiring.