Punta Cana is PURE Point to Point leisure
Buenos has Oneworld connections available by LATAM Group however is actually a heavily local and traditionally high yielding market in the main.
BTW Aer Lingus are highly unlikely to serve the South American mainland continent any time soon.
Also runway30 you are wrong on the IAG hubbing over Dublin from the UK regions , its not happening . In fact Aer Lingus has reduced ! available UK - Dublin connection opportunities into the main North Atlantic departure banks ,Liverpool gone , Doncaster gone , Cardiff gone ( left to a Flybe codeshare).
Manchester and Birmingham flight have just one daily flight into the bank with an ATR meeting the later west coast and Hartford bank.
The other flights are very much UK-Eire Point to point traffic .
The numbers connecting across Dublin from the UK regions are much lower than many think/believe/expect.
In 2016 there were 1 million transits made over Dublin out of 26 million passengers - Just 4% and that included what ever Ethiopian were carrying and the price sensitive US-EU trade.
It small fry in the scheme of things. Heathrow remains the BA/AA hub of choice with Madrid serving the Southern part of the continent imho!