This was sad to hear.
I'll pass on the best line about Malcolm's musicianship and guitar skills I've heard which I told one of my student groups today, and it was in a random guitar article I read in the 80's. Basically said that Malcolm Young's right (strumming) arm should be bronzed and put in a hall of fame whenever he's done with music. That summed it up for me, and as a younger player I began listening to his parts on any AC/DC record that I'd hear. The rhythm guitar played by Malcolm was the heartbeat of that band, no doubt. He was one of the best rock rhythm guitarists of all time.
Moneytalks is one of the best riffs they ever wrote...it surprises me how many younger AC/DC fans I work with don't really know that tune. A friend of mine went to see that tour, and they did drop the Angus Bucks at one point in the show like they did in the video, and he got one. Pretty damn cool.
Here's one for the musicians...AC/DC's greatest strength in terms of production, arranging, and the sound of those records...leaving space for the riffs to breathe. Listen to a few of the classics and you'll hear plenty of glorious, open space...the brilliance of their riffs is that they never overplayed for the sake of filling the bar with notes. The open spaces were as vital as the notes themselves. Malcolm as rhythm guitarist can take a bow for that.