i guess the goal was to have an all in one option. this is what makes the HH Mod 4 so popular.
i love my wb traveler and TL double, but hate bringing a separate net "in case". with the skeeter hatches at some of the alpine lakes, its hit or miss if you'll need the protection. i also find a separate net has disadvantages:
-its finicky to set up
-drags on the ground
-doesn't help keep stuff in the hammock
-sags into the hammock as there is nothing to spread it out generally
-is tough to open and close
-weighs more than an integrated net- unless you're going UL with options like papa smurf and a gt nano or whatever. but if you're owning a wbbb or SB, then features are more important than shaving oz's.
as stated... the truely netless hmmk has, for me, been troublesome in keeping my stuff, most notably, the TQ in the hammock... i.e. legs are always falling out over the edge. some have combatted this with a sewn-on footbox, or adding shockcord to cinch up to create a "pouch". i won't say i've deemed the traveler a "non- hiking" hmmk, but it is definitely reserved for colder temps or lounging.
another thing i like about the mod is that i can pull about a 1/4 of the net out of the foot end storage pouch, zip it just far enough to create a "ceiling" for my feet, to keep them in the hammock.
ultimately, we can all defend or praise or wish for this or that.. believe me, my gear neurosis is out of control sometimes. but 2QZQ offer some of the most all inclusive, innovative options there are, while retaining the primary functions of the gear being modified. there is never any right or wrong... hence the HYOH default.