How you use the UG tour plans depends on what you want to get out of your trip. Use it more as a guideline if you have several days and atmosphere is more important to you than rides. If you only have one day and want to hit everything the UG tour plans are the way to go.
When I go to WDW I use the book as a guide not as law, because I know WDW is only 2 hrs away and I can do things I missed at a later time point. On the other hand, I went to DL with my BF at the time and we follwed the UG to the letter because we only had a day and wanted to experience everything. Let me tell you, we saw everything and had time for snacks. Of course, wonderful Len Testa didn't write the tours for the DL UG (at least not to my knowledge), but the point is you can use the UG's advice any way you want. BTW, the other 5,000 pages in the book are pretty useful too! I use that information more than the touring plans to be perfectly honest.