Surf & Talk, Conference Calling Verizon iPhone 6
From what I've read over the past few weeks, the roll-out of VOLTE will not completely resolve the limitations of the iPhone 6 for Verizon. In order to talk and surf on VOLTE without wifi, the caller and recipient would both have to have a VOLTE capable phone, be in a VOLTE coverage area and be on the same network, in this case Verizon. If any of these requirements are not met, talk and surf will remain as it is currently with existing Verizon iPhones, limited to a wifi connection.
In regards to conference calling functionality with more than 3 people, I'm really unsure if VOLTE will have any impact on this. Until VOLTE is everywhere and inter-operable between all carriers, CDMA technology will come into play which will limit the features of conference calling. GSM handles this differently and this gives ATT/T-Mobile users more options in regards to advanced conference calling.
I personally switched to Verizon at the beginning of the year due to coverage issues with ATT within my home despite having a Micro-cell. Calls continued to drop even with full signal. Since I work from home occasionally, I needed a needed stronger signal and made the decision to switch to Verizon. The experience with the Verizon iPhone has been painful at times. It's easy to take for granted talk and surf and advanced conferencing calling features when you don't have them after switching carriers. With that being the case, I'll be going back to ATT on 9/19 with the iPhone 6 and will work on an alternative for reliable home service coverage.