Its not abusing IMO thats the intention of the ability, to 'abuse' it is to use it for its intended purpose, which constitutes it as being strategy.
think this game has 2 parts strategy and tactics.
Strategy is the bigger picture, ( i'll take this upgrade and build these units in this game againts that player because...,)
Tactics is the way you employ your strategy and make it win. eg using the high ground, flanking and getting surrounds and all that micro that i just haven't got right yet . well thats my 2 cents anyway from a gold leaguers perspective.
Even the smallest donations help keep sc2sea running! All donations go towards helping our site run including our monthly server hosting fees and sc2sea sponsored community tournaments we host. Find out more here.