Yeah, .25 will give you better accuracy, but at the expense of range. .25 need a more agressive hopup setting to get the backspin they need. Unfortunately, the hopup on the TF11 is fixed and set for .2g. But as you said, as a side arm and for CQB, that's all the range that you really need.
By no means are these things long range weapons or accurate. And neither are the real ones either - although I'm sure that range-wise, a 9mm bullet will travel far regardless of the gun it's shot out of. They're made for close quarters and to throw an assload of bullets downrange in a short period of time. And for that, these work exactly like that.