Siri works everywhere, you never have to quit the app. Welcome to the future!
Activating Siri means you're leaving the app. You don't seem to know iOS very well, maybe you should keep saving up and one day you'll afford one of your own.
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That view isn't meant for details at a glance, but for an overview at a glance. Tapping an event gives you the details, or you can simply zoom in and have it look like in Apple's calendar if you want.I'm not joking and "yes." And do you REALLY not believe that app maker specifically did not use 2 hour events at a minimum to make up for the fact that you can't tell what the events are WITHOUT them being that long?
Please, do explain in what way being able to pinch to show more hours in the portrait mode would be worse.And to your last point...if you want something different or a feature that really only important to a minority of the MILIONS of users out there, you can buy an app for $2.99 and tell the world how great it is. It doesn't change the fact that Apple made the changes it did because they felt (and it is their product) that it is better. If they feel that the "problems" you listed are real, they will change the app....but I'm betting that out side of colored dots, the current app will stay as is because it is easier to see and use this way.