I just played through the arcane tower after patch 4 and noticed that there were a couple extra arcane robots at the top of the tower with Bernard.
So there was Bernard and six others instead of four others.
*
I still had an easy time with the fight because I happened to have sussur flowers on me and my main, a warlock multi, used a repelling eldritch blast that knocked Bernard out the window. Nevertheless, I'm happy to see some movement in regards to the difficulty. Adding enemies is a good sign.