I subscribe to TG and Guitarist, and I think they're both perfectly good magazines. Yes, there's a lot of advertising, but there's a lot of advertising in any specialty magazine, and that's part of the point of a specialty magazine anyway.
Most of the people who moan about TG seem to believe that they should run only Slayer, Pantera and Metallica (but only pre 1991) tabs and features, and to be fair they DO do a lot of that stuff anyway (proving that you can't please all the people all the time).Indeed, it's a much fairer criticism that Guitarist has WAY too much blues coverage.
Now I'm something of a realist, and I realise that there's probably never going to be a mag called "Hard rock and melodic metal guitarist", and so accept that the magazines that are available are going to appeal to a slightly wider readership. It's the same with the reviews. Are you going to by a Mexican strat? Maybe not, but many, many people are.
As for MCR, they are a highly relevant modern guitar band, and indeed their coverage in TG up until this point has been pretty minimal (especially when when you consider that groups like Lamb of God have probably had more). The bottom line is that more people are going to be interested in MCR and their playing than in some self harming, horror film obsessed Finnish Tech Metal band who've shifted a tenth of the number of albums.