I could also just as easily say I suspect those who defend and praise AFFC do so not because the book merits it, but because they are loyal to GRRM and feel he can still pull it together and end the series strong. If he recovers and reaches the heights of 1-3, then this book's defenders can be vindicated and claim the apparent drop off was simply the difficulty of middle book syndrome.
I think you're being narrow in your focus and simplistic in the way that you dismiss "defenders" of AFFC. You're making the argument that anyone who liked AFFC not based on merit but rather, based on some sort of loyalty to GRRM, and because the book did not live up to your expectations, the same must hold true for everyone else who read it.
I'll preface the following by saying that I'm legally blind and reading print books isn't a good option for me. I can do it, but I get headaches because of the glasses that i have to wear, so I almost exclusively do audio books. Listening to a book takes a while, and one of GRRM's takes a long while. I've read AFFC at least 3 times, possibly 4. I've lost track. I'm working my way through another re-read at the moment, and will try to time finishing AFFC to closely coincide with the publication date of ADWD. Having said that, I'll also say that I consider my life choices, and I have enough life experience to know that my choices are very simple- Do the things that make me happy, or at least things that have a good chance to, or knowingly waste time, which i find is passing more quickly with each year, and is becoming an increasingly precious commodity.
I didn't read AFFC because I'm loyal to GRRM. The people that I know and know of that have done multiple re-reads of this series, some of whom you'll find on this board, didn't do so either. You go to your child's crappy school play every night that it runs because of a sense of loyalty. You don't re-read a huge book that was disappointing, lost it's way, has crappy characters, etc. out of a sense of loyalty or because you hope the next book(s) will be better and return to the quality of the earlier books. you just don't.
For the new people, If you haven't taken the time to puruse some of the topic threads on this forum you should do so. There has been LOTS of criticism of GRRM in general, and AFFC in particular. The problem with your criticisms in particular is that you aren't saying anything new, at least not for the regulars here. It's reached the point that except for some really crackpot ideas (something like, umm, Eddard is really alive because he doesn't die in his own POV, Sansa never rally gets a good look at him, and the head on the spike doesn't look anything like Eddard to Sansa), saying there isn't anything new to say. The analogy i'll make is that there's a GRRM book club that meets a few times a week to discuss his works in general and ASOIAF in particular. These people have been meeting for the past 7 or 8 years and continue to meet, despite the lack of ADWD being published. A new person shows up one day and makes so0me very eloquent arguments for GRRM being a slacker, losing his focus, lying to his readers, etc (admittedly, you haven't said all of those things). The old regulars shift uncomfortably, some roll their eyes, some feel embarrassment for the newcomer, other get pissed off for their time being wasted. Everyone is fairly polite, but the new member is politely told that none of the old members have any desire to spend their meeting time focusing on negative things that have already been covered. It doesn't make the newcomer a bad person, or even unwelcome, it just means that the book club doesn't want to reinvent that particular wheel.
Think of this forum as being an online version of that mythical book club. To be really blunt, there's probably nothing new that you can bring to the table, unless you uncover something new about the HBO series, or happen to stumble upon GRRM's ADWD release announcement before anyone else, or come up with a new crackpot theory. Your participation is welcome, your objections to AFFC and GRRM's ADWD process are duly noted.
What now?
PS my book club analogy is a general one, not particularly directed at Soul Singing as much as the very new people that have come here complaining.