Well, I could say the same for your position.
We already have hundreds of scenarios and hundreds of vehicles,- I don't think people are yearning for yet another variant of tank X or vehicle Y. Scenario-makers have problems getting people to DL and play their work, because we already have so many to choose from.
I think a lot of people would be interested in enhancing the quality of the EXISTING games, campaigns and scenarios through an upgrade of animations and sound-design.
And I can't tell you how many ressources it would take, or if it would delay anything, and neither can you...
But I do see a huge interest in getting the CM2-games to look and sound better (just count the number of mods!). So an official sound- or animation DLC from Battlefront, would have a good chance of selling well.