My issue with their created tiered voice is voice pollution at the squad level, especially since the way its implemented those in the upper tier are not hearing how busy voice coms are and it doesn't seem to mute the conversations in lower tiers so it just creates this weird garbled com of everyone talking over each other.
For me, a better solution has always been the use of multiple channels. An example you would have the typical squad level and then the squad leader would be in a platoon channel (often ends here because more than 30 players become hard to coordinate) But you could add another layer with a company channel. The whole idea is each channel doesn't typically have more than 10 people in it and allows for information to be shared at the level where it's important. Battlefield 2 did this surprisingly well with the squad leaders and commander in one channel and each of the squad members automatically in their own channel. This allows the commander and squad leaders to communicate tactics and squads to focus on enemy location and engagements within their influence.
It's easy to see in Star Citizen the boarding team doesn't need to know how the interceptor wing is doing protecting Montoyas Bengal nor need their comms interrupted with Montoya instructing the Capital Captains in their target priorities, nor can I imagine the amount of interruption mumbling would cause.