Floxzy......
What anyone says on this forum about the inner workings of the visa office can only be speculations.....at best, deductive reasoning, nothing more....except that person has insider info...
I think the best way to get through this waiting is to consider the immigration process a plan, with a contingency. The contingency is your present life here......and all the planning and budgeting that goes along with it. That helps a lot. It really keeps the pressure off.....
From experience on this forum, including threads not Naija based, very very very few people get rejected after receiving PER, (that's the whole point of the cap placed on applications in the first place), and such rejections are almost always based on excessive demand clause. As long as you make notifying CIC or Accra promptly about any changes in your status in any form (marriage, family, employment, address etc.) a priority, and you check your mails regularly, and send the occasional case specific enquiry, and keep your trust in God like a good Nigerian, you will get your PPR and visa in God's own time.
The important point, is that, it's a waiting train.....it doesn't run forever.....but while you wait patiently, get on with life.....your Plan B...