Are you saying that a lesser number of troops on the border are an indication that he is not really intending to follow through with it? Think the current build up is circa 130,000 troops stationed just behind the border. Is that your understanding? I don’t know the minimum would have to be to from a military perspective but I think (as far as I have followed) that all of the indicators are suggesting they are poised for an imminent attack based on reliable sources (not based on what the media are touting in the press). Also have to factor that it is likely to be a land, sea and air invasion, not just boots on the ground.
As ever, it is difficult to understand the extent of the media exaggerating it but after the last invasion in 2014 and Crimea, it would be difficult to explain purely as a product of the media talking up the idea. That’s why I mentioned about Putin’s (possible) rationale for it.