I don't see what the problem is. If the majority of FR pilots are happy, why try and convince them they are not. What's good for the goose is not necessarily good for the gander. I find it amazing that people who have never worked for FR will quite happily criticise, while knowing very little of what they talk about.
I happen to work for a company that has Balpa recognition, and am very happy. They have made substantial improvements to our T's and C's over the 10 years+ I have been here, and believe they are very good value. We have always been lucky with who has represented us on our CC.
To suggest that FR will bring down T+C's for the industry as a whole is suggesting that being unionised is not worthwhile, as Balpa will not be able to prevent the reduction of your T+C's. This, I believe, is cobblers and will quite happily pay my 1% tax deductable fee to maintain and improve my working conditions.