Yes, Race is the problem, as in it was changed from Caucasian to Black.
TAS was/is/could be Canon, in that series, he was drawn as a white male age 75. So the character was established as a white male.
Them changing the character to a black man for SNW is a problem, as they already established he was white in TAS.
It would be like, Hey this is Commodore Stocker, but played by an Filipino. Hey he was a minor character, so we can recast him to whomever we like. Nope. Invent another character or chose a old character that was the race you want.
Does that mean I'm raycist because a black man was cast? Nope, if they wanted a person of color, they could have gotten any number of already established black admirals/commodores, or invented an new out out of whole cloth. Honestly it would have been more refreshing if they cast someone from Turkey, or Greece, or Iran for the diversity hire. Would it have still been wrong? Yep, but i would have applauded them a bit for not going the black route for POC.
They didn't NEED to change his color, but for diversity sake? it was changed.. Why? there's no point to it. I'm pretty sure there are plenty of 60 ish white Canadien actors at the time.
Owell, its done, I can't change it, but I can point it out and be disappointed in them.