While I was surfing around, trying to find backup to my claim Ablaze(TM)! encourages Gospel reductionism (a claim I stand by), I realized more than anything what ultimately bothers me about it than anything: it is asacramental. Oh yes, you can read about baptisms and other such stuff on the site, but the whole driving force behind this isn't conversion as much as just "getting the message out" in a somewhat haphazard way. If your missiology is asacramental, even remotely claiming it is Lutheran or can be Lutheran is preposterous.
The best post on what missions are and what they are not I have seen yet.