In the end, not even adhering to a different strain of socialist thought prevented Cuba from sliding into authoritarianism; in fact, ATL's syndicalist Cuba might be even poorer than OTL's communist Cuba, a state that at least punched far above its weight in some areas. "If the moderate Fidel Castro hadn't been killed Cuba would be a worker's paradise by now" and "If the United States had left Cuba alone things would've been far better than they are now" will probably become common mantras in the syndicalist world.
How's the left doing in Italy? The PCI used to be the West's most important communist party, but it became a shadow of its former self soon after the Berlin Wall fell. Stalin's second Holocaust probably made the DC even more obscenely powerful than it already was, and the trend of former communists becoming stalwart conservatives that begun here in the early 1990s has most likely started already... hopefully, syndicalism will pick up enough pieces from communism to prevent the left's slide into irrelevance - even though I'm sure apologism of even the most brutal syndicalist personalities and regimes will run rampant among them...