Basically it's people who have something to GAIN from the 'vaccine schedule' that are 'giving advice on the vaccine schedule,' so that's a bit of a problem right there.
For our kids we 'spread them out' just based on our own instinct that lots of shots all at once couldn't possibly be good for our toddlers' developing immune systems.
Aside from that, kids who get the MMR at age three or later are far less likely to be autistic than those who get it at the 'recommended' time (15-18) months. Of course 'correlation is not causation,' but with autism being a diagnosis for a lifetime, why take the chance? Have the kids get the shot later.