Agreed, it would be nice to provide feedback and questions as part of the development process. The knowledge of the community is a differentiating factor for IRM I think and should be leveraged. It makes IRM models different from other manufacturers.
Would have welcomed the chance to say I would be reticent to buy without the van being available also. As a collector rather than a modeller, not being able to complete a set is a major issue. For example the lack of extra unpowered wagons for the auto ballasters from Marks still annoys me. And before you say it, yes, I know OCD, first world problem.