One of the many things data-driven decision-making doesn't tell you is when people drop off your product because they just don't trust you.
Your logos, your colors, your voice, your layouts, and/or your general vibe may just be turning them off.
Maybe it's unprofessional. Maybe it's too corporate. Maybe it clearly shows a lack of attention to detail or quality execution. Maybe, just maybe, it's obvious you SUCK.
So you can spend a lot of time trying to optimize this part of the funnel and that part of the funnel - but what you really need is to take a step back and ask yourself broader questions.
Questions like...
Is this whole thing good enough?
Is this the right metaphor?
What kind of overall story am I tellin - is it possible I'm repeating myself or not setting enough context?
What end-to-end adjustments need to be made to make this experience more consistent and clear?