I don't thinks so at all. I love the term "current expectations". What kind of "expectations" are you talking about? Something specific, objective and firm or something nebulous and wishy-washy? Or in other words, describe those expectations as best you can, and I will shoot holes through them.
The methods I use are objective. Another appraiser who follows the same method should come up with the same result in terms of final value. There would be no difference. For example, I am just finishing an appraisal of beach front homes, where the distance to the beach measured in feet is one of the primary driving factors of price. There are 600+ homes in the PUD that come into consideration. I have to measure distance from the beach for all them. Stamina. I also measure visual obstructions, - approximately. Oh yes, there is the golf course, we need a column for Golf with an indication for which homes are on the edge of the golf course. Work. I use R/earth for accurate regression. The residual is the accurate measure of all intangible features. I study the comps for differences between themselves their ranked RS score and the subject, then assign an estimated RS score to the subject. I let my software system grind and out pops something like $3M +/-. You can change the random seed to the regression -- and you will pretty much get the same value. You can change the other parameters that do impact output - but the value that pops out is pretty stable. I have a protocol, I publish it, and another appraiser who follows it should get the same result pretty much. But, ..., you also need a protocol for determining whether the results make sense. Sometimes there are bugs in the software or data that need to be ironed out, or something you missed. If you stick with it, you should have a workable model in the end --- and different appraisers should come up with about the same value.