How would a short term hit to game shape prevent a team from catching up? It might prevent a team from constantly shuffling in new "expensive players bought cheaply" but does anyone consider a team which is constantly doing that as actually having caught up to the the truly top teams?
Was there a final consensus on the GS hit for buying players? It seems like a bad idea to me because buying expensive players cheaply is one of the only ways that teams can catch up without tanking. The top teams consistently make more money by winning - whether in home attendance, cup games, or merchandising - and so can maintain a higher salary.
Unless one wants to accumulate the same amount of money, usually by tanking, the only way of staying competitive is by buying hihg salary players at the last week.