If engineering was deleted from the game overnight, I don't think it would effect many at all. We would all quickly get use to the new ceilings, we would each have our individual meta builds, they would just be different to what we had with the Engineers. In other words, WE WOULD ADAPT, just like we did when Engineers was introduced.
As for the idealist dream that nerfing Engineers would somehow get rid of gankers. Nope, can't see that happening. We are talking about a group of people who think it is enjoyable to attack inferior ships, to fly around stations ramming people in their free Sidewinders. Get rid of engineering and all that would happen is these low life's would just revert back into flying around in A rated meta builds looking for those in weak, lower spec'd ships (and of course religiously avoiding any ship that might pose a threat to them, after all aren't all gankers just reverting to their schoolyard bully persona

)