It would be nice to have LUTs that do more legwork for Corona Renderer's particular style of tonemapping. I understand tonemapping is receiving an overhaul(?), so this suggestion might not age well. Corona Renderer ships with dozens of LUTs, but I would guess only a fraction of them are regularly used. On the other hand, Dubcat's LUTs - some of which ship with Corona - are frequently cited and praised.
Just a suggestion, but the idea of LUTs that cater and enhance Corona Renderer's particular 'look' or 'style' is interesting.