Some points I think are worth keeping in mind to see how this situation differs from the Battletech video game with its tranny Lead Designer:
- Senior Writer is not Lead Writer
- GW will certainly have control over narrative direction, if that is of any assurance
- Assuming this game is comparable to the first one, there's really not going to be much story content at all, just continuous shooting and smashing in a war against bug aliens (and whoever the third-act antagonists will be)
- The player takes the role of a preestablished and beloved Space Marine character, or otherwise generic Space Marines if there's mulitiplayer, so there's really no room for a trooned character creator with pronouns, gender mismatching, or male/female parts being labeled as "B"/"A".
Anyway,
just looking into this person a little further, it seems that Saber only just hired him for this 40k project a couple of months ago. Otherwise, he appears to have constantly bounced between companies on temporary contracts, so who is to say that his time at Saber won't be just as limited.