Right teams will decide after development camp.
This gives some kids a chance to get warmed up for NHL camp and get another good tournament under their belt.
It is a momentum situation that will provide extra information.
Unless they are going to make the NHL or not 100%, I would send them.
I am not a fan of burning elc's or giving 9 games at the beginning of the season.
Send them down, have em go to 23 World Jrs also and make roster moves by the trade deadline if they are excelling. Then call them up for the last 9 games and save that year with the elc slide, while still integrating them with greater information, development and confidence in that decision before the end of the season.