1. 4G tethering / hotspot is amazing and doesn't require an additional subscription on previous Nexus phones.
2. 16 GB (13 GB free) is miniscule today, especially for a phone with limited streaming capability due to #1.
3. Non-removable battery also means no extended batteries. One of the first accessories I buy is usually an extra or extended battery.
That's not entirely true, it's less efficient but you can get charge packs or battery pack "case" which provide USB power to the phone, either on the go or to top up the battery.
Verizon's 4G definitely rivals Comcast's cable in terms of latency and reliability, if not in raw speed.