I get that they wanted to age Alexander, but (contrary to what some might think) DS9 was not a soap opera. On soaps, it is commonly accepted by viewers that children are rapidly aged so they can be featured in storylines. In fact, it's so common that it has an acronym, SORAS (Soap Opera Rapid Aging Syndrome). But DS9 is not a soap, it's a sci-fi drama. What's frustrating is that the sci-fi element basically gives the show a built-in excuse to make Alexander appear older than a normally aging human child. It's perfectly reasonable to assume the rate at which children reach adulthood would vary in alien species. I mean, look at the Jem'Hadar, they reach maturity in a matter of weeks! All we would need would be Worf looking a picture of his son as a child, and then when we meet him, someone remarks on how fast he grew, and Worf could explain that Klingon children grow much faster than human ones, and so are considered adults at an earlier age. As it was, the writers just made themselves look stupid by having him show up as an adult.
But as for Worf as a father, well, he was a pretty neglectful one. This is especially glaring when you compare Worf/Alexander to Sisko/Jake. Sisko was almost too involved in his son's life, while Worf was so removed he didn't even know his son was serving on a Klingon ship. The whole thing with Alexander really made Worf look bad, but then I was never a big fan of Worf to begin with...
But as for Worf as a father, well, he was a pretty neglectful one. This is especially glaring when you compare Worf/Alexander to Sisko/Jake. Sisko was almost too involved in his son's life, while Worf was so removed he didn't even know his son was serving on a Klingon ship. The whole thing with Alexander really made Worf look bad, but then I was never a big fan of Worf to begin with...