Oh. You wanted to see more romance between them after. I get what you mean and a part of me sort of wants to but I would rather not ruin it. After Story did it beautifully. Whether or not Toradora could pull off its own Afterstory... I am not sure it could.
I know

if they would make the after story, I would watch it and say ''omg. they managed to fail this''

so the serie is perfect as it is, but I just feel it is incomplete (I get the same feeling from many series)

but relly, I would liked better ending scene than
Taiga just smashing her head to Ryujis chin and then it was over.
gonna rewatch the serie within this month