it would work if you simply got rid of the fixed number raid size and allowed noobs to zerg that shit with 100 players again. Then you could design shit for roughly 40 players again.
No one cares if they zerg it down with 100, especially with weekly resetting instances. it just means it will take them three times the time to gear out their noob zerg.
It's so hard to set up a roster of that size because if you're just a little short, no raid is happening because of the mental block of MUST HAVE 40.. and if you have too high a reserve, people will burn out over having to reserve their evening for raiding, except they don't get to raid.