According to what I just read the Embargo can only be lifted by Congress and here come the Republicans to take control of both houses soon. If these Republicans stick to the old views don't expect much real change toward Cuba.
Cheers,
Merlot
Everyone knows the embargo has done nothing to change anything in Cuba. Engagement at all levels would have been a better way to change Cuba.
While true that the Republicans in Congress are making a lot of negative noise about this, they are not a completely unified bloc. And, as the 2016 elections approach, this apparent unity may start to fray. Already 55-60% of Americans are apparently in favor of changing or removing the embargo.
Plus, some very large business interests are already agitating for a piece of the action. Look for the business lobbies to pressure the Republicans. What everyone is eyeing is the "after the Castros" era which is just over the horizon. Already European and South American (and Canadian) businesses are positioning themselves to benefit from the soon-to-be "new" Cuba. If Americans wait too long, there will not be much left.
http://www.nytimes.com/2014/12/19/business/us-businesses-assess-cuba.html
Just the tourism business with its pent up demand in the US probably represents a multi-billion $$ opportunity.
One last point I'd like to make: as you pointed out, Merlot, the younger Cuban Americans seem to be more receptive to change. The Democrats may have found an issue to get young minority voters in Florida out to the polls in 2016. This could be a smart move.