I am sure they can restage it for a proscenium theatre so it's just as effective as it was on the thrust stage.
I am sure it will be OK at the Savoy - but I doubt "just as effective". Goodman, as Tevye, builds up a remarkably intimate rapport with the audience (he is a very jovial Tevye and a wink or raised eyebrow conveys a lot with seemingly little effort). This is easier in the Crucible with its single tier and seating arranged around three sides of the stage, but will lose a lot behind an arch and with seating facing, on three levels, the stage. At the Savoy, in particular, there is not even the link with the audience that slips and stage boxes provide - thus making the stage seem even more remote.