The Senate is a deliberative body, and its primary work requires debate . Already too much gets done behind closed doors and outside the public eye. Dispensing with even the pretense of open debate is somewhat concerning.
Can someone point to any concrete results of debate on the Senate floor from anytime in the last 20 years or so? I am genuinely asking, because it seems to me that the value of debate on the floor is like you said only pretense at this point. Mandating that pretense and in turn making the Senate slower to react in an emergency seems like an actively harmful requirement.
Meanwhile, behind closed doors, lawmakers are horse trading and calling in favors to get their pet projects passed.
This is pretty much how Congress has worked for the past 100 years or so.