Version 1.0.2 has launched (initially for Switch, then PS4), which fixes several hangups beyond the connection woes. You can now skip boss and Myrrh drop cutscenes, which were exceedingly annoying when they all added up and you were seeing the same things over and over again (all remasters should make basically everything skippable).
It also ironically fixed a multiplayer bug that allows certain players to see hidden locations if they were in a game with someone who already found them. It also crushed an infinite item dupe bug and contains "various bug fixes."
So if any of those things were annoying you, they should be better now. As for the sweeping multiplayer alterations, that is likely still to come. The decision to region lock multiplayer is still mind-boggling: you'd think with cross-play and cross-regional capabilities, a lot of these "can't find a player" issues would solve themselves.