From one set of Troubles to another

Why does it seem to both Ulster Unionists and Irish nationalists that the British and Irish governments seem oddly eager to report more optimism about the Northern Ireland peace process than conditions on the ground actually warrant:

BBC Northern Ireland political correspondent Martina Purdy said Sinn Fein and the DUP claimed to be "puzzled by the optimism" coming from the governments over the possibility of an imminent resolution.
"While republicans have apparently made an unprecedented offer to deliver acts of completion over the IRA and its weaponry, in exchange for the full implementation of the Good Friday Agreement, the structures of power-sharing have remained contentious," she added ...
SDLP leader Mark Durkan warned the governments against imposing proposals on the political parties in the next few weeks.

It couldn't be that the British government really needs all their troops currently stationed in Northern Ireland somewhere else, could it?