TheFireMonkey's page

Check out the table "Actions in Combat". It has "Use a touch spell on up to six friends" listed as a full-round action.

In like manner, Charge is a full round action that includes movement. Casting is a std action, you you cant double move, like a charge. But touching 6 people as a full round cast and move combo, I think, should be handled similar to a charge.

I get RAW, and action economy is thoroughly play-tested. blah blah blah.
Here is why house-ruling makes sense.
You gather 6 friends, and test both ways. Walk 20 ft and then touch all of them clusteted around your ending spot. Then, spread them out and touch them one at a time along the way.
The second way takes LESS time. The only way it could possibly be faster to nove then touch all 6, is if the 6 are waiting for you at the end of the 20ft with their hands in a "gooooo team!" configuration. And thay would take actions on their parts...
"This makes sense. That is stupid." if the foundation of DMs having autonomy.