I guess most of us are not that much of sticking to the wider canon when making fan-edits or suggesting ideas (personally, I prefer to acknowledge TCW, if anything) but the Jedi Temple/Imperial Palace bit is actually one of my favorite elements of the new canon, and the idea the Jedi chose Coruscant to build their Temple to suppress the power of an ancient Sith shrine is pretty compelling besides opens a wide can of possibilities.
Either way, I believe you’re developing a genuinely great idea, jonh. It would be awesome to have this opening. And even if it’s not plausible in the end, Coruscant would act as a pretty background for the First Order board meeting, instead of a random location in space. That’d be a funny little shout out to the unproduced “Duel of the Fates” and what it could have been.