Let's not forget how much data the Guardian was providing. Spock mentioned how quickly it was coming in. "My tricorder is capable of recording even at this speed." He missed "centuries of living history" unspooled in a manner of minutes. Spock had to take the information, slow it down and unpack it so he could read indiviudal events. The tricorder probably wasn't made to handle that. Even Nomad burnt out stuff because he sent it too quickly and that was to the main computer on the Enterprise.
So considering how much data was sent at that high speed, not to mention that it was provided by an alien being/machine (plus Rod only knows what time travel can do to their tech), I find zero issues with Spock's need to tie into the ships computer or an equivilent.
So considering how much data was sent at that high speed, not to mention that it was provided by an alien being/machine (plus Rod only knows what time travel can do to their tech), I find zero issues with Spock's need to tie into the ships computer or an equivilent.