sadly, all Kirk really needs to do to be a useful asset around 2 WAR is have a wRC+ around 90. His defense more than makes up for his other deficiencies. Of course, a dip in defense makes him replacement level. On the flip side, an uptick in the bat pushes him back up to 3+ WAR, which is completely fine. A lot of the frustration around Kirk is the same as it is with Vlad. We've seen the upside and now he's not there just 1 season later.