For me, goblins have always been scavengers, clad in left-overs and re-sized armour from other races, not manufacturing weapons like swords, merely re-using those from others, and generally being tribal little bastards. They're dangerous, not a joke, but they're not a "mini-orc", nor do they possess their own real culture/civilization. They're also a "real"-seeming species, not stylized or fancy. They talk and act bigger than they are, too, all threat display and then running away.
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5E's, on the other hand, as I said, look simply like someone has seen Movie-LotR's Uruk-Hai, and said "What would it look like we made these guys 3-4' tall?". They have weapons of unique, non-D&D-style manufacture (total LotR inspiration there), their armour looks individually-made and is certainly made for goblins, specifically, and has impractical, very stylized spikes/hooks on it. Their heads, to me, do not look at all "goblin-y". And being brown, rather than green? That's downright un-goblin-y, and not a good direction (grey would have been better, if changing from green). On top of that, they all look pretty obviously male/masculine (again, this seems retrograde).
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EDIT - PPS I think we can safely say that, had Pathfinder not taken "flat-faced, green, tribal" goblins and run with it to the point of making it practically a brand, we wouldn't be seeing goblins like this. The whole think REEKS of branding imho.