That really sucks big time. Why can Funimation get the production companies that release anime allow them faster dubbing of anime shows? Some people don't want to wait. Like me.
They can, and they have with multiple shows, thanks to their broadcast dubs
But some shows either don't warrant the immediacy of dubs, or perhaps they're requested not to do so. In which case, it makes more sense to release the dub once the physical releases are ready. Which, the physical releases aren't typically ready until they're done releasing in Japan
Bikini Warriors is a special case since the entire series was released in one set in December in Japan, but I'd imagine Funimation will just stick to the regular development cycle for it, if they've even bothered to pick up the distribution rights