Personally I don't think that "5 shopping trips" prove much at all.
What conclusions can be drawn ?..possibly that at the right price you can pack pax into "3-3" with 29 inch seat pitch & poor if any IFE. But then this is what they & other airlines have been doing for years on the TFS run & NYC probably + 2 hours flying time out & a bit less back.
Now there is only a certain limited specialist market for these pax & I expect they are particularly price sensitive so very high LF's would have been sought. But then again were these not actually flights, but "all -in mini breaks", which having regards to the UA offering render them irrelevant in any event.
Whilst on with UA pricing then a recent example of a colleague who was is the North East & had need of a one way flight to Florida. UA quoted him c. £4k NCL-Florida one way business class, he was about to confirm this, when it was brought to his attention by a 3rd party that UA offering the same journey but on a "round trip basis" for £2.2k. Guess who was a "no show" for the return leg.......
Unsure what this says but you can see where UA sought their revenue & not in packing them in cheap & cheerful in "Y".