@JDub:
It's really impossible for us to know for sure, I guess. But that seems to be the case based on the pattern of behavior regarding Toei and the handling of their properties overseas. I can't imagine Funimation particularly wants to sit on dubbed Dragonball content for multiple years at a time because it basically prints money, and there isn't any benefit to holding out for so long. As you mentioned, Sailor Moon, one of Toei's most profitable franchises and one with an established US fanbase, was unlicensed for a long time until Viz picked it up a few years back. But, like you also mention, that also wasn't from a lack of trying from other companies including Funimation. Properties like Dragonball and Sailor Moon, and to a lesser extent One Piece, are pretty safe money, but for all three there have been multiple stretches of time where new material, groups of episodes, or even entire series go unlicensed for seemingly no reason.
Something else I thought about while writing all of this is the difficulty Toei themselves have had in the past with licensing their properties. Dragonball and One Piece, two of their biggest properties, both went through some growing pains in the US before settling in. Like Dragonball had the Harmony Gold dub back in the 80's, then they tried to relaunch it in the mid 90's with the Ocean dub (which even then floated around in syndication until Cartoon Network picked it up), then it finally settled into the in-house Funimation dub we know today. I mean, I'm not sure if all of that negatively impacted the series' popularity since it was a 'right place, right time' kinda situation when it took off, but I'd imagine Toei's management did not like seeing a series that had a lot of potential popularity in US markets fall on its face twice over the course of a decade. And obviously 4Kids One Piece exists, which handicapped the series and damaged the brand in the US for years. And I can't speak the DIC dub for Sailor Moon, but I think it's telling that getting your hands on a copy of it now requires some digging and shelling out the money for out-of-print DVDs. Toei's been burned by companies mismanaging their properties in the US, and I think what we're seeing now is them exercising a tighter grip on their properties. That's just my two cents anyway.
Thank you for shedding some more light on the topic. It does seem odd that Toei relationship with Funimation is somewhat complicated (I can't think of an actual word to properly describe their relationship), considering that Funimation has yet to actually burn them in regards to their properties, unless that Rock the Dragon Collection was something Toei didn't approve of. From what I've read on the Funimation's forum it seems that Toei wants to them to prioritize Dragon Ball Super over One Piece, which granted from Toei's point of view makes sense considering Dragon Ball is more well known than One Piece in North America.
As to your earlier comment about some of Funimation's voice actors not living near the Dallas/Fort Worth area, I don't that's really problem (at least in the voice acting community) considering the number of voice actors that have done voice over work in Texas, California, and New York, such as Matt Mercer, Cherami Leigh, Michael Sinterniklaas, Laura Bailey, Bryce Papenbrook, etc. (granted examples I listed are mostly Texas and California). Something like a live-action series, especially one that's been revived after being cancelled for a number of years, is a bit more difficult. Since the original actors for the show will have likely moved on to different projects in-between the show's cancellation to it's revival, which is why Netflix's initial season for the continuation of Arrested Development had episodes focusing on one or two of the main characters (before they re-cut that season) and why Community ultimately ended after season six.
And maybe I reading to much into it, but I think another sign that Funimation is not cancelling the dub, is the special features present on their latest releases (such as behind the scenes stuff and interviews with the voice actors). If they were cancelling the dub I'd think their recent releases would be a very bare bones release with just the special itself and possibly trailers as the only special feature. It wouldn't make much sense for them to put more effort into something they were planning to drop.