Really?
Eriksen started last season slowly. It wasn't until we went 3 at the back that his freedom off the ball allowed him to flourish and gain confidence.
I'm judging by the end of last season with Kane and without Walker and Rose. Like I said, individually in a 3 he could score one and be man of the match for his technical ability, but we dominated a lot more as a team with other players on the pitch. Son is proven as giving more goals so if he is fully fit you'd actually have to drop Alli to fit Eriksen in. I'm not opposed to changing it, but it's simply a case of that starting team is tried and tested as working better when we finished last season and no other one is yet.