It is not over-rated. It all started almost 3 years ago with MQM (minus 1 formula) and culminated in PMLN (minus 1 formula). Engineering is not just on poll days, it is about arresting political leadership and activists, implicating them in false and fabricated cases, forcing them to change loyalties (especially of those who are 'electable'), creating a tsunami of propaganda against them, calling them anti-state and anti-establishment, linking them to our arch-nemesis India to heat up public sentiments etc. and so on. It takes a very long time and even more effort to pull this off.
The saddest part is that efforts and resources of our agencies, better spent on RAW/CIA/MOSSAD nexus in Afghanistan, Dubai and Iran, have been spent internally instead, for reasons not in favour of Pakistan.