I agree that bans should be enforced on a match number basis rather than time, but that the ban should cover all games in all tournaments.
So if he got a two match ban in the 6N he can't play in any games in any tournaments or otherwise at all until the end of the next two matches in the 6N.
We all know that in this case for example, Healy would not be playing for Leinster during the 6N at all.