I have no issue with Tatum getting the 'last shot', but to assume he is a go-to guy throughout the 4th quarter at this point in his career might be a little much.
Also, I don't know why you are grouping Smart and Brown together. While Smart has a knack for hitting a late three and is consistent from the ft line, Brown has the ability to get to the basket at will and can also hit that same corner 3 at a better efficiency than Smart. Frankly, I am looking to at Brown over Irving at this point - at least until Irving can get comfortable in Stevens' offense.