I think regarding the twin pack scenario, people will have to make their choice buy or dont buy. If lots dont buy and the stock doesnt move I would expect this type of L.E. twin pack not to be repeated. If however they all sell out then clearly the market has spoken.
Perhaps we will see different L.E. choices in future.. or as I suspect, these will sell out and thus the twin pack will continue - as with every product the quality fo the end product will determine its success. B)
Personally I would like someone to do a twin pack of ltd edition "fixed" Heljan 86's with speakers in both but only a decoder+ motor in 1 for running my intermodal traffic... however this strays towards froth...