I don't think the low alcohol level precludes Buckley's from being craft beer or an Irish Golden Ale. I would say sessionability is one of the characteristics of the style.
If I handed a group of beer nerds some stouts and some porters and they could not say which was which that would imply that stouts and porters are the same thing? Say you blind tried tell Hooker, Or, Buckleys (maybe Carlow IPA) apart from two light English Ales. If you could would that not imply they were a distinctive style?
We get three Irish Golden Ales (which may be shown not to exist by this test) and two similar English ales. If we can tell them apart the Irish ales are different and maybe their own style if not the Irish ales don't exist and possibly we don't <!-- s:? --><img src="{SMILIES_PATH}/icon_confused.gif" alt="

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