The full, IA-style pass mechanic has undergone at least some community testing, and proved to be far too powerful. It wasn't quite the rigor or a scientific study from what I understand, but when a trial run is such a dismal failure you don't necessarily need a full set of data to conclude more moderate changes might be merited. What that would look like while staying true to KISS principles is a matter of considerable debate.
As far as activation padding goes... 4+ flotillas with one combat ship probably has at least some superfluous flotillas, but judging a 3-2 list is a lot harder, as geek19's regionals fleet shows. Sometimes your fleet has three roles that only a flotilla will fill (I will point out that all of his flotillas were more than just 20 point comms net fodder, though). The proposed modification to the rules that flotillas do not prevent tabling seems like it might be what's needed here.