"So for example, a natural turn would be a good start for a routine, and many top dancers do this.But if you follow the natural turn (2 bars)with a link step(1 bar) you're on this weak bar 4 for the start of the reverse turn. So this wouldn't be the best choreography in the world, but it would still be good, and only a championship grade dancer would be too concerned about it."
Note that this means that you can't use both natural and reverse figures and have the man going forward on the strong measures in both cases, unless you use changes that have 2 or 4 steps per bar, rather than the usual 1 or 3.
So for example, sticking only to traditional figures, the viennese waltz cannot have the man going forward on both sides on the strong measure.
In slow waltz, you would need to use some chasses or drag hesitation type groupings to switch from man's right foot forward on strong measures to man's left foot forward on strong measures.