I'm upset they made him older. To summarize, Pike said Georgiou "drank us all under the table and knew all regulations by Week 2" at the Academy, basically saying they were Academy classmates.
Georgiou is confirmed onscreen as being born in 2202, and going to the Academy in 2220-2224 in her onscreen personnel file.
Before now, grey hair in Kelvinverse Pike aside, we have assumed Pike was born in 2219 and was 35 in The Cage (2254), to roughly match up with Jeffrey Hunter's age of 38 in that episode. There was also a dodgy line in TOS implying that Pike was roughly Kirk's age of 34 when Pike ran the Enterprise. (Dodgy in that the line was said in 2267 about Pike's age in 2254, and it wasn't clear what year Mendez was referring to when he said Pike was roughly Kirk's age).
Regardless, mid-30s Pike as of the Cage was an accepted idea until yesterday's episode.
Now however, for Pike to be Georgiou's classmate, he would have to have been born in 2202 also, and thus be 52 in The Cage.
Thus, we're upset that Discovery is saying Pike was 52 years old in the Cage, even though Jeffrey Hunter looks way younger than that.
So I and others are upset that Discovery made Pike 17 years older. As you can see on this thread, some here like the idea of him being older. Thus the debate. Hope that clarifies the discussion a bit.