Sure, glad to give feedback, though this would make sense if you're familiar with using stripe. Our team is of course not one of Stripe's larger users, though we do use them enough to fall under one of the volume discounts. Here's a few things that I can think of from the top of my head:

When selecting a user to change the plan, the modal takes about 3-4 seconds to populate the new plan dropdown. The new plan dropdown is like 200px wide, which makes managing multiple plans pretty cumbersome.

The main dashboard view only has Gross Volume, with no way to switch to other views (ie, no way to take into account refunds)

Event view is pretty cumbersome for managing things, as it shows only 20 events at a time. Also, event filters apply to all of customer payments, not one ( so going to filters resets whatever customer you were looking at )

Logs are labeled with non human readable things like "200 DELETE /v1/customers/cus_2fdyjF3lV1FYyc/subscription"

There's no dedicated "Name" field for customer details though there is a name field that lives under card details.