This stuff matters, of course. The chloroform calls of some to not worry, because Catholic doctrine on the indissolubility of marriage cannot change, ignore the reality of the damage that can be done without any technical change.
I submit that there is already a practical schism already in place in the ranks of self-identified Catholics over sexual moral doctrine. There are other fissures on other issues, perhaps not quite so marked. But in a worst case scenario, this Synod could literally lead to schism. It probably won't, and even if it would it likely won't be immediate.
But does that really matter? Isn't it bad enough that such an outcome is plausible?
Disaster. That is how I would describe the situation where the general public is of the opinion that the Commandment of the Lord Himself on Marriage, and the tenets of the Natural Law on procreative matters, are both up for grabs.
The question remains, will it be a total disaster?