IronWolf
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Now, you have 40k people on the DDI VTT Beta signup list. Imagine for a second that they all decide to go for the playtest. How do you weed out that information? After all, playtests have to have controls in place so that the data is not skewed. How would thousands of responses from a different play "area" skew the results.
For example, one recurring problem in 4e is the number of effects in a round. I totally understand why people would have that problem. I don't. I play online with a framework in Maptools that tracks all of those conditions. With a bit more work, you could have a framework that would actually track those conditions and add them in for you automatically - see the DDI VTT for that.
I think they could easily compensate for this by making one of the early, control questions "Did you play via a VTT?". Then they can sort survey responses as they see fit. They could even see if something works better in one gaming medium than another.