When I was working on a batch of stucco moldings for archiviz, there was a problem. There was one high poly model and it was necessary to transform its large parts with the preservation of fine details.
Using zbrush as an example: first I make a silhouette at a low level of detail, subdivide, make fine details on the current level, then subdivide again. When it is necessary to change the proportions of model, I go down to the first level and change the shape, then the details from the upper levels are projected when I go back to upper level.
How to make it in 3d coat? The Move tool ruins fine details on a dense grid, I would like to go down to overall shape and not affect them.