Actually those features WeChat wants people to use as new users are pretty intuitive and straightforward. For other functionalities, those are intentionally 'hidden'. Those advanced or experiment features are for those who look for those features or just spreading by friends.
On the contrary, the other big player in China is Alipay, it's pretty much trying to put everything on the first page like Kowloon Walled City - noisy, messy. It just punches everything in your face.
Interestingly, they both serve their purpose, but following different design philosophies. WeChat wants to be a good product, while the Alipay wants to be a portal for every new service around you from Alibaba.
PS: To have an initial impression on how Alipay is not only a payment app, it literally trying to directly covers everything around you, for example:
* Buy everything, or course.
* Pay for electric, gas, and water.
* Riding bikes, bus and metro. Parking, re-fuel, pay your fines.
* Loan, pay credit cards, stocks, insurance, lottery and donations. Or give your child or your spouse some pocket money on monthly basis.
* Also the 'social credit' system you might have heard of.