That change was suggested by FreePBX devs because they considered it was given to much power to users so they can configure things wrongs. I was not very happy to comply actually, but here we are. You would not have problems if you update freepbx to version 2.8 or higher. If you cannot do that for whatever reason, you have some alternatives:

1) modify autoconfig-buttons-freepbx.sh so instead of just printing the queuechannel field from the fop2buttons table, it prints out what you need, something like:

channel as extrachannel, \
concat('Local/',exten,'@from-internal/n') as queuechannel, \

(and remove queuechannel from the variable WANTED_FIELDS above...

2) update the fop2buttons table by hand and set the queuechannel as you need.

Or even 3) modify functions.inc.php in fop2admin and modify the line that sets the queuechannel field:

$queuemember[$cola][$mem]="Local/".$mem."@".$qctx."/n|Penalty=$pnlty|MemberName=".$membname[$mem];