More so reasonable than indecisive, I would argue.
Reason would suggest that, at some point, the answer to this question is indeterminable.
Just as any proof, when subjected to enough scrutiny, is bound to yield indeterminables. The very method of determining the determinability of a hopeful determinable makes the determinability even more indeterminable. 100% determinability is a Selassian illusion, to be pursued, but never attained (and even that statement is not 100% determinable, that's goes to show).Heisenberg demonstrated that, partly due to mechanics, but more importantly, it seems that the fabric of universe revolves around indeterminability and probability, not certainty.
The question then becomes, what is the acceptable margin of error on either side, and what is more reasonable and converging to the widely supported notions, by multiple discrete, reviewed points.
And then one ought to make a decision on whether god exists or does not.
Fence sitting (whether due to apathy or lack of enough knowledge) is not reasonable, it is shying away from the question.
If one was to adopt fence sitting as the more reasonable approach, no question would be settled.
Not that of getting up in the morning.
Not even 1 + 1 = 2.