I'd like to throw my support behind a save feature.
And here's why.
UGTB - Shota Rustaveli Tbilisi International Airport - this is the default Terrasync scenery. Two default layout runways.
UGTB - with an updated layout from the X-Plane gateway, then run through the TerraGear genapts web tool. The layout needs a lil extra work though. Into FlightGear with the surrounding tile removed.
13L/31R is a disused runway. Not sure how best to handle it. Leave it like this and modeling big X's is my idea - unless theres a better solution. Probably rework it in WED I guess, not too sure.UGTB - with an updated layout, being swallowed by the surrounding tile.
With a save tool, I'd adjust the surrounding tile as needed and go from there.
With WED, the online genapts tool and a save function with FGBlenderTools I'd be able to update layouts and scenery as I need very easily - and all well within my technical ability. Regenerating the scenery through TerraGear is beyond me - I've never got it to work as I've needed it. (Ideally I'd know someone who could generate the scenery to work properly - but I also don't like the idea of relying on someone for that)
Anyway, that's my $0.02.
-S