It be nice to see one again, but it does not need to be USS Discovery. One of the old complaints I heard in the 80s and 90s, was that the TOS era Starfleet was not presented as diverse enough for the amount of territory they were patrolling. Not every ship would be a Constitution, nor should it be if there were only 13 or so of them in the fleet. What about the other ships? Discovery gets to be basically the first ship of that era we see in Star Trek that isn't a Constitution or a freighter.
Those complaints made I would speculate were made without taking into account that they didn't have the budget to bring in different ships, they had to get funding from a model company just to get the shuttle.
Had they had the cash, I would imagine there might have been more ships from starfleet that aren't of the same class as the hero (herione?) ship