Now A Fly Girl, you're showing our ages! These younger types wouldn't remember that Sheb Whooley hit from the early 60s. Thanks for deciphering the URL, Mac Attack.
As for the strategy of setting up Tango, just look at the Web Specials every week. Those Caribbean routes really cannot be sustained under the current fiscal realities, so it would not surprise me to see AC converting some of these scheduled "Sun Destinations" to Tango routes, with a much pared back scheduled service.
As for the seating, now you can see what the real economics of low fares means: All that extra space in J, plus that couple of extra inches in Y, makes it hard to break even on what people are apparently willing to pay.