Actually the disguise change is more valuable. With that many dead bodies, any new guards that arrive on the scene tend to have heightened awareness and will just drill you in the bin. But if you get the disguise, you can walk away.
In fire fights I also tend not to rely on the bins/boxes… I’ve died too many times from guards being too smart. If I fail to change disguises in time… better to continue killing towards another costume type than to try for the bin/box.
If I fail to change into something suitable stop after stop and I’m still alive… that basically means I’ve killed everything on the map… lol.