I am sorry for correcting you, but Queue Period means the opposite - having it at close to 0% will mean what you wanted to say - that any time you press (or, more precisely, after 0% of a bar elapsed), the fill/transition will get queued to the start of the next bar.
More realistically speaking, having it at strictly 0% will mean that if you delay your press timing just a little bit and a new bar already started (but you wanted to have a fill/transition here) it will mean you will not be able to do it, and will need to derp a whole new next bar (as you will be able to only queue your transition)!
That’s why clever engineers at Singular Sound chose to make 25% the lowest value for Queue Period. At first, I was against that as well, still I was proven wrong as soon as I started actually playing. Theory and practice often vary significantly! 
Queue Period of 25% will mean (for a 4/4 bar)
- If you tap/hold in the first quarter of a current bar - fill/transition is applied instantly (for this bar)
- doing so in second, third or fourth quarter - queues it for the next bar.
BeatBuddy is very easy to learn, but can be pretty difficult to master! Try playing with different Queue Period values. At first I was almost sure 25% is what I need. But value of 50% is what I loved the most after several hours of playing.