I spent like 20 minutes trying to order 5 drinks the other day. It was also annoying because when I left the app, all my selected items disappeared.
Additionally, if you think about the feature set that would be required to facilitate bulk orders then you will quickly find that it would be quite large feature set and require it's own flow. The app does has new-ish features that allow you to re-order prior orders and save drinks, which would help for these bulk orders, so they are making progress. If you are consistently ordering drinks for a large group of your co-workers then you can save their drink preferences and boom.
Whenever I try to order something through the starbucks app, I have to try multiple times because at some point in the ordering process the message, "unfortunately starbucks has stopped," or something like that will pop up and the app will close. Usually no progress is saved. Often it will crash right as it is processing the payment, and when I open it back up I have to go to the order history to check to see if it went through. Usually if I make it that far before it crashes then my order will have been submitted successfully.
I would love to be able to skip the UI and just submit my order an alternate way, but maybe the answer is to just stop being so cheap and to get a new phone.
I was ordering coffee and my balance wasn't quite sufficient. I reloaded it via PayPal, but the balance didn't update so I tried again (it did error out). The app crashed, I reopened it and found it had added both transactions to my account. Open dispute on PayPal for just one of the transactions, got a refund but my card was completely locked out - $0 balance, couldn't reload it (the dispute was after I tried contacting support). So now I don't go to Starbucks.
I have to take issue with the "Starbucks app is great" line, though. I think I've had more problems with it (on iOS) than any other app. It's the only app that (for a period of many months if not a year) was regularly unable to find my location. Even if I opened up Maps or some other location enabled app and found my location before launching Starbucks, it would just bomb out.
Overall the app seems to have tons of 'issues'. It's been better the past few months though. And it beats the hell out of standing in a 10 minute line. I honestly wouldn't stop at Starbucks anymore if it wasn't for the app.