I disagree. I think Tyler could benefit from FM at this point. Tyler isn't an only child and there is enough back ground noise in the house that he could benefit. Not only in the house, but when they are out.
I disagree with your statement about FM not making speech clearer. It does make it clearer. I get speech discrim with FM that I do not get with aids only. With FM, especially with an external mic (I use the lapel mic all the time) the mic is significantly closer to the speaker, therefor picking up way more than when the mics are 6 feet or more away - like when the mics are on the ear.
I will also warn you, the sound quality of the mylink sucks. I used it for a year and a half before getting boots. Tcoil picks up a lot of electronic frequencies. I couldn't use tcoil on the bus, close to my tv, in many places in my home, if there was a camera taking pictures. the buzzing would literally take over. I would hear nothing else. The boots solved this one hundred percent.
