I think he was talking about visuals, mostly.
Those examples KingDaniel gave can be explained:
- Pike supposedly being sexist: Remember, in "The Cage", Pike's just coming off that fight on Rigel VII where his own yeoman and a lot of others were killed. Perhaps that yeoman was female, and Colt's presence was reminding him of that loss, which is why he's uncomfortable with having her on the bridge. (If Pike was really sexist, he wouldn't like Number One being there either.)
- The cloaking device: I assume this refers to the Klingon sarcophagus ship as we saw in DSC. There's good reasons why Spock might not know about that. It could have been classified, and/or Spock's trauma re: the Red Angels could have affected his memory.
In any case, since TOS was often inconsistent with itself, these discrepancies with DSC are not really that serious in the grand scheme of things.