alternative to Walk casting

[Mikey_R]

I mean in theory I could envision a Gunbreaker that:
...

Don't know about anyone else, but that sounds horrible to play. I also do not know what DBD is, so I cannot make any comments on that. Also, dealing damage at the end of the GCD is a good way to make a job feel really bad to play. With a 3 second delay, it would feel unresponsive. You would want it at the very least when you press the follow up button. I would also have a concern that the GCD button doing nothing other than starting the timing minigame will make it feel tacked on. It's an issue I have with Summoner's Summon Demi GCDs, with the only redeeming factor that you have a bunch of oGCDs to press now, otherwise, it is a GCD to do effectively nothing, where other jobs would put it all into an oGCD.

It is not something that is *new*, it is better to take a look on the market and see how indie games can do it,

I never said it was a new concept, but would it fit in FFXIV? That is what you would need to decide. As an absurd example, I can't just say, make it so you press a GCD and then have to stand still and solve a 3 stack Tower of Hanoi puzzle to do damage. Could it be done? Yes. Is it sensible and does it fit the game? No. The biggest hurdle you have is the timing. You cannot make it super strict, otherwise it will feel bad to play and the job will suffer, make it too long and it is just another oGCD that you either early weave or late weave depending on timings. This is before we get into whether it is a good idea to force this mechanic on your job whilst you have to deal with everything else at the same time.