Feature overcrowding, used to be desktop, now everything must fit into mobile. I believe they all feel need to change with the times. Have you seen any fast food joint looking the same and thriving? For that matter, most retailers as well? Cars? I think you're insight into change is not with them but you.

Their goals is to entice new users and making it exciting for existing users.

You on the other hand like your comfort zone. We all do.

However, you may want to notice that you've changed too. you wear the same clothing fashion as you did 5yrs ago? If you're selling something and your product doesn't change with the times, you're antiquated and will die a slow death.

A bit of irony about needing to change is there is ONE company who haven't "changed" but yet they are now worth $2T... Apple. Their new shiny shiny looks the same every year but people buy sight unseen. They however are an anomaly.

One change I HATE: deprecated usable API's and changing functionality from version to version sucks.