I would really like to be able to export arrangements direct from the Arranger Track without having to create a flattened project first. It could be a new option in the Export Audio Mixdown window, alongside the current options for Locators and Cycle Markers. If them, why not this too? Points in favour:
When I’m trying out an arrangement, I’m not really interested in the tracks and events, just the final result. It’s quicker to export directly, especially if you’ve got a few you need to send off quickly.
Any tweaks to the track will not necessitate a re-flattening.
Flattened events don’t always sit happily against each other (I use a lot of live audio). Clicks happen and cross-fading becomes necessary, which is a faff.