I don't know the answer to that question. Firstly, I am not sure that EVMs could be in place at all. Secondly, for such a fraud to happen, polling staff needs to be on-board. Q-League had been in power for 5 years & Chaudhries had been in Mushy's good books (after all it was ISI which created Q-League on Mushy's order to begin with, using NAB & case files) for more than that. So it was not surprising that rigging at that level had succeeded. However, people's reaction against Q-League was so severe that rigging at that scale did not make much difference. The PML-N winning margins were twice the votes counted for Q-League in most places (saying that from what I recall, see results to cross-check).
According to Dr. Safdar Mahmood (former head of IB), any more than 15% rigging becomes noticeable and invites serious reaction.
EVMs are a whole can of worms in themselves. Unless these are backed up by paper evidence, these would always invite suspicion. Even with paper-backed EVM system, there would scarcely be enough resources to handle all the objections raised. Remember the probe into voting for constituencies where PTI had disputed in 2013 (4 in the beginning, raised to 35 later?), the votes were available for a recount, but after a lot of trouble had been raised & courts had been involved. Election Commission does not have the wherewithal to handle the sheer number of complaints which surely would multiply with presence of EVM.
Three things need to happen for people to trust EVMs:
1. Strong countermeasures against hacking or other ways of data manipulation.
2. A strong & independent EC that wields enough authority to punish errant elected officials. We can't see that happening as of yet.
3. Zero interference from various agencies - ISI, NAB, Army in general, Bureaucrats, etc...
Until & unless the above three are thoroughly established, I do not see EVMs becoming accepted.