The possible side effects of soy intake is something I've noted previously, I definitely should have mentioned the potential side effects of soy in this post. However, the research for and against soy isn't so cut and dry, there is research touting for its benefits and cases for his negative health effects, like most things, soy intake should be looked at case by case, everyone's experience with soy will differ. Seeking professional help in discerning whether soy intake is healthy for an individual is always advised.

both of the below links are good sources of information on each side of the soy debate.
http://www.mdpi.com/2072-6643/10/1/43/htm
http://www.veganhealth.org/articles/soy_wth

Personally I consume soy at most 1-2 times a week, often not at all, I've gone though periods of no soy intake, through periods of higher intake, in my personal experience, I have never felt any noticeable difference in health between abstaining or consuming soy. Like you said, there is so many other plant based protein sources out there, therefor soy intake can easily be eliminated. :)