Why British Empire alternate histories can feel static

Why do British Empire alternate histories often seem to lack imagination?

The problem may not be universal, but weaker examples ignore how imperial planning and institutions were already changing.

One explanation for unimaginative British Empire alternate histories is that they overlook changes already under way in imperial planning and institutions. Some assume that events must follow the familiar historical path, while others preserve the imperial system unchanged. Either assumption can miss the direction in which the empire was developing. This criticism is qualified by limited familiarity with recent examples.