I pray that Mr. Dyspeptic is wrong — I don’t think we can know what will happen until we have the final resulting Apostolic Exhortation based on next year’s Synod final report. Hopefully, the Pope will in the end support moral orthodoxy like Bl. Paul VI did with Humanae Vitae.
In any event, I honestly don’t see this as a big issue. If you are in this situation, then either take to heart the words of Christ and live like brother and sister and take communion, or else don’t take communion and wait until old age when you can live like brother and sister anyway, and seek the graces available through spiritual communion and the like. And the pooh poohing of spiritual communion is ridiculous. Obviously it is not the same thing as physical communion, so it is not as full a channel of grace as the latter, but it should impart some measure of grace into the soul that seeks it. It’s going to be a long and nerve-wracking year coming up.
I hope you're kidding. This Pope is floating the idea of giving Holy Communion to those who persist in remaining a state of mortal sin.
Of course, it's a big issue!