When I said burnt out, I meant giving your child literally everything. Make them learn written english, ASL, spoken english, spoken spanish, spoken german, BSL, and so on. I mean, after all, a lot of people complain about speech therapy, right? Why? Because they felt that they had better things to do, more constructive things to learn. Which is why I said that Bi-bi approach, to me, really isn't a FULL toolbox, only takes the priorities (ASL and written english) and focuses on them.
Honestly, I'm just picking on words, really. I'm simply making a point that ANY approach has its priorities, because you can't teach a child everything simultaneously. You can only try to.