I have no problems with any of the current directors but for a while now I've been thinking it would be a good idea if Funimation also used some "new blood".
I heard Funimation holds an open casting audition once a year (the chance to basically have your contact info listed and maybe get called in for work in the future).
This is the basically the only opportunity for any aspiring voice actors & voice actresses or stage actors & stage actresses looking to move up from theater, to get their foot through the door into the anime voice-over industry (in Texas).
Most of the current talent pool who are regularly cast got into anime either through a friend who already worked at Funimation (early years) or got lucky at a convenient time.
Those who get selected at the open audition (and eventually get called for work) start out voicing background or minor characters (additional voices) and eventually move up to voicing guest roles, recurring roles and maybe main roles.
One problem is that some talented voice artists never get the opportunity to move up from "additional voices" and guest roles because the voice directors prefer to cast the same people.
The voice directors would rather cast someone who's range and voice they're familiar with instead of a newbie who they don't really know.
A lot of people who work at Funimation are also good friends in real life. That's great and all but the downside to this is that sometimes the voice director miscasts their friend for a role and their favoritism can ruin a dub.
You only need to look at some voice director's credits and see the main cast. You start to see patterns and it becomes very clear which voice actors & voice actresses are overused.
The directors can try and defend themselves saying that they keep their personal relations apart from their work, but the fact is whether they want to admit it or not, working with friends can affect your decisions and more often than not it usually does.
Another thing worth noting is that while everyone who works at Funimation has heard of each other, not everybody has actually worked with each other or even met each other.
Having some new voice directors would "even the playing field". They don't know everybody so they have less pre-existing favoritism during auditions for new shows.
New directors means more opportunities to have new people in lead roles (main & supporting characters), less type-casting, and a chance to have fresh dubs with voices that don't remind fans of "that's the exact same voice from that show".
I wouldn't mind seeing these people directing new dubs in the future:
(they all have experience but I guess no opportunities with Funimation at the moment)
Chris Ayres (Night Raid 1931, The Wallflower, Xenosaga, Nerima Daikon Brothers)
Patrick Seitz (Girls Bravo, Tales of Phantasia, Kamichu, Monster)
Christine Auten (Utawarerumono, Best Student Council, Moonlight Mile, Pani Poni Dash)
Sonny Strait (several Lupin III titles, Galaxy Railways)
Justin Cook (Yu Yu Hakusho, Fruits Basket, Dragon Ball, Kiddy Grade)
Matt Greenfield (Tears to Tiara, Blue Drop, Coicent, Five Numbers, Gantz, Neon Genesis Evangelion, Golden Boy)
Of course some haven't directed in quite a while (e.g. Strait & Auten) or some have other duties (e.g. Justin Cook is a Director of Production; stepped into that role a while ago at the expense of not having time to direct dubs anymore or even voice act as often)
Well those are my thoughts. Not sure if anybody else feels the same way but if you do let your voice be heard!