This oddity really threw me off at first, but eventually I got used to it and realized it's actually a good thing. Being able to queue up swings means that you can maximize your swings-per-minute. Under the old system, there was always SOME kind of delay, but by queueing up swings you can start the next as soon as the previous finishes.

It does mean you need to watch out in situations when you don't want an extra swing, such as when you want to pop Deep Vigor or Brunt Force just before the final swing. Once I realized what was happening, though, I was able to gather more carefully to prevent overswinging.