[dnadler]

Not quite sure what you mean, wouldn't an A/B test be able to answer questions like these pretty easily?

[MetaWhirledPeas]

Across what time scale? Are you going to run your A/B test over the course of years to see if the changes drive users away?

[texxtxxet]

This was my argument at the time: build long-term trust with your users (including in your UI) is more important than short-term gains.