just thought I throw some things out here for people to chew on:
1) at least some of the the feeling that this card could somehow be too strong is based on widespread lack of knowledge about playing against the card. Once you start facing runners that know to trash on sight, it gets much weaker. (obviously, this can be easier said than done in IG, more on that in a second).
2) Many of the people dismissing these types of decks for their "obvious" downsides (54 cards, 15 ICE, etc) have either never played them, never played against a skilled pilot, or both. IG in particular is a very tough deck with tons of strong matchups right now, and genuinely has 54 cards it wants to play, and only about 15 of them are ICE.
3) The reason so many people have so little experience with and against these decks is simple: they are extremely impractical to play in a tournament setting. There have been a few wins by very skilled pilots running lightening-fast runners, but in general reliably fitting a game with these decks into 30 minutes is going to be a pipe dream even for relatively experienced and fast players. Add in the fact that runners are inherently reactive and as such even the fastest runners can be drawn into longer games, the chance that you'll make it through large events without getting unfavorable timed-results seems very, very low.
Sure, in a "true" meta where the only measure is how often you can win the game in the end, these decks might be very strong (Personally I think there are "T1" IG lists out there as we speak). We'll probably never know, though, because the vast majority of the community's strongest players (and the majority of the community's want-to-be strongest players ;D ) are playing with a mind towards tournaments and thus probably won't ever be attracted to playing these decks.