I like points :)
All that said, taking away points would take away my motivation. Players joining 7000

games play totally different, the dynamics of the game, the seriousness they take it is basically different and taking these away would take away much of the "high-class" games as well. Personally GR doesn't motivates me and I never care my rating, but I do care about my high pot games.
I don't like the #2 idea either. Meta/multi is generally the problem of low pot games from which you move away anyway.
I admit it's a problem, but it occurs mostly at new players with few games only, because you can't maintain being a multi on the long run. Sooner or later you'll get caught.
There were many suggestions in the past already, but the basic problem is new players will be always new players without any record how or whom with they play. And without these information you can never decide whether he's a multi or not.