I absolutely agree - please put the shipping cost back. Shipping is a real consideration in the total price of a drop, and shouldn't be hidden.
The truly unkind side-effect of making you click "Join Drop" to see the shipping cost is that if you decide you can't afford it, you get a reminder email when the drop is about to end. I only get this on drops where I have clicked join and then not joined. It's basically Massdrop rubbing salt in the wound of not being able to afford the shipping, which I think is really inconsiderate. The reminder is helpful if you haven't decided or wanted to wait, but not when you get it for every item where you checked the shipping cost.