What I saw from Yoshi-P's comment is that they are not only looking for more manpower, but also looking for actual skilled developers to take on the heavier tasks requested by the community.

When FFXV is done, SE definitely needs to give some of them back to the FFXIV team. We know that won't happen with KH3 and FF7 remake coming up, but if FFXIV is pretty much SE's savior from their financial troubles at the time, I would think to make sure the development team there is plentiful and happy. Then again, what do I know about business?