if advice is not what you wanted to get out of this thread (which, given the title, may well be the case), that's fine. but please refrain from calling everyone elitists just because they put time in fighting games; many ppl here have offered advice, and in no way have you been brushed off or called names.
as for the underlying OP question, i do think IGAU can appeal to casuals, but only as long as they play among each other. but that holds true for every competition, and no one is asking such questions of, say, sports for example (see the link
Karried posted). you don't know what you're doing but play it with others who take their shit seriously, you're gonna lose.
and just to clarify this, i have never been to a FG tournament (don't really have those over here) and i don't play online, but i enjoy playing FGs with friends going back to sf2 and mk. doesn't mean i don't have fun learning and getting better, as it is a satisfying feeling. honestly, when i pick up a new fighting game it isn't fun to me until i understand the mechanics - i feel that is the most important aspect of any game.
and since 15-hit combos seem to be your point to counter every suggestion thrown at you, consider this: every tool off the street, not just your "elitist who lives in their mother's basement", can learn 15-hit combos if they put the time in, but they are still getting their ass handed to someone with good fundamentals.