That's a great point. Any integrative solution worth its salt offers some level of customization. But you're right; maybe because everyone's needs are a little different, it might not be viable. Any idea how to validate this part?
BTW, I was actually thinking of redirecting users after signup to a beautifully designed (customizable) onboarding flow that includes an A/B test as part of it so that product managers can play with it as much as they want without devoting engineering resources.
Thoughts?