Interesting [long] reading...
I get the impression that in this long story the greek side showed a constant attitude of lack of political realism and intelligence.
This is not to say that the turkish side is any better, but because the greek community has the largest population and had more political power in the '60s, it had the capacity to steer things in one direction or another. This also means that it had more responsability for what happened.
The initial greek leaders (Makarios) seemed to have acted foolishly. How could they so bluntly ignore the presence of the turkish community and the geopolitical situation of the island? By closing doors to the turkish community (pushing for an unitarian state, and creating milicias), they favored segregation and radicalisation of the society. This was a godsend to turkish nationalists and paved the way to partition of the island.
The '74 catastrophy finally hammered down some notions in the greek psyche (you can't ignore Turkey, in Cyprus). However it does not seem to have resulted in a refinement of the greek strategy.
Since partitioning of the island, and thanks to greek leader's stupidity, the turkish side obtained far more by arms than they would have gained by negotiation (advantageous share of the land, separation of the population). This basically means that they have "won", and have little interest in sitting again at a negotiation table.
The only exception to this is the attitude of the international community. By blockading and refusing to recognize the turkish side, it prevented its economical development. This is the last lever the cypriotic greeks have to bring back the turks into negotiation.
It's an effective lever, but a fragile one. As usual, the greeks seem to overestimate it.
Most of Turkey's willingness to support a re-unification of Cyprus comes from the fact that it wants to join the EU. This provided a window of opportunity to re-unite the island
But the application of Turkey is going to be considered by the EU this year. Turkey will probably be rejected, which means that it's willingness to encourage re-unification will evaporate.
Even if the EU accepted Turkey's application (unlikely), this would only give some more time to obtain re-unification. Once Turkey is part of the EU, there will be much less to bargain for.
Anyway, I don't see why do the greek cypriots expect to be able to get better terms than the previous UN plan. I clearly don't think they know how to achieve that. The better they can hope for is to get the same terms, or if things drag, even worse terms.
With time, the cypriotic turk community will be less isolated, and will develop economically. More turkish settlers may come. I don't think they will accept joining a federation which will limit their autonomy, reduce their land, and provide fewer benefits.
Time is against the greek side, but the greeks seem to be counting on time. I don't see anything constructive coming from them.
Actually, I think the greek cypriots are not doing realistic effort to seriously achieve re-unification. Although they will not admit it, maybe they do not really wish a re-unification with another community, which will lower their power and force co-existence.
If that's the case, then things will stall for some more decades, until it becomes accepted that the two parts of the island will not reunite, and separate states are recognised.