Semi.It's ridiculous to cast people who look at all like previous iterations of the character in the prime universe prequel show?
It shouldn't be the first priority, since doing an impression of a past character is not the goal, but to give life to a character at a different stage of life than seen before.
Or hiring the best actor for the job and calling it "close enough," such as with Robin Curtis as Saavik, or James Cromwell as Cochrane.