Three years of the character's life was spent in Tarbean. I entered the University at 15.. so essentially 1/5 of the characters total life was spent in that ciy and considering how old he was at the start of the book and that only a year at the University composed the entire rest of the book.... No, there wasn't an excruciating amount of time spent in Tarbean as far as the writing goes.
That aside, since the entire book is the character telling the story of his life, its only fitting that he spent quite a bit of time on events that drastically shaped it. The parts about Tarbean arent wasted in talking about every little detail, quite the opposite, it focuses on several quite important (to the character) points of the three years: Losing the lute, making an enemy in the city, finding safe haven with Skarpi, being unable to help someone he wanted to because it would give away his safe spot, they story of the Amyr that refueled his journey, and how he came about the money to do so.
Sure his use of sympathy and learning things at the university are more "fun" things to read about to some. But to cast aside a major part of the characters background in his own version of the events of his life would be to completely lobotomize a part of the character. Kote spent so long talking about Tarbean because it's important to Kote... he doesnt give a damn if it's important to Chronicler ... and especially to Mjack.
When you gloss over the gritty details that drive character creation you end up with stuff like Star Wars Episode 3 where Anakin goes from being a whiny teenage to suddenly falling to the dark side in a matter of a few scenes and then is suddenly evil. The story should have played way more into the inner conflict of the character and the choices that drove him to the darkside... instead he comes off looking like a puppet that had no choice simply for the advancement of the story.