These new UI changes are likely following a choice to slicken-up Instagram's feel, mainstream its capabilities, and refocus on the needs of the average FB user. I don't see these changes directing community-building or appealing to the photographer community.
I've downloaded just about every photo app there is for my iPhone. I've also joined every social network that sounded even the least bit appealing as soon as I could scrounge up an invite. But I have a confession to make. I have fallen in love with Instagram.