If it ain't broken don't fix it. This site's main purpose is to point out there is more than one way to grow an african violet.
Most successful growers realize that.
Humidity, lighting, temperatures, fertilizer and soil are some main factors in the health of any plant. Any variation of any of those factors will make a difference in the way a plant responds to it's care. I suggest to add humidity to your violet area. The real winner here would be common sense, take what you might need and leave the rest for someone else to use. Take one small step at a time using just one of your violets from your collection and watch it very closely.