That's all out of context. By and large all those problems were due to new states working things out and very minor. The problems were way over blown. The goal was to take control of senators away from the state gummints. Why Gilligan doesn't know this is beyond me. Simple misunderstanding? If William Jennings Bryans and Randolph Hursts support for it doesn't drive the point home, the goal being national entities being able to get at and control them, nothing can.
Delaware was not a new state. I would not count multiple years without a Senator as "very minor".
Was it overblown? Maybe, that's an opinion that is supported by the facts, but nothing more than an opinion (either way).
Did some people have ulterior motives? Well, I certainly would never argue against that thought; I've yet to see anything ever where someone did not have more than a singular motive to make a major change to the way things are done.
So, maybe we're both right? But, one set of things was argued in public, and it was enough to make the change. Sadly, the counter argument has not worked (yet), but I have hope (not faith, but hope) that the states will put forth an Article Five convention and fix things. At least some things.