I personally don't think that with the stamina bar comin back, bunny hopping would become a more significant problem. When the bar was still there people sometimes started to hop when it was emptied as they could not run anymore.
So without the bar, bunny hopping in general might be a less attractive solution for people to get away, as running is faster, non-stupid and overall probably offers a higher possibility of survival.
That means with a reintroduction of the stamina bar and jumps not draining it, the situation will be the same as with the stamina bar that had jumps draining it.
Because people won't hop more than they hop now when they can still run.
=> Bunny hopping amount will be around the same, no matter if hops drain the stamina bar or not.
But: As the stamina bar is currently not implemented, there might be slightly more hops than right now.
=> Stamina bar might (!) lead to slightly more bunny hopping.
That's my view on this.
@jan
Okay, you experienced that different then. I don't feel that too many people abuse the unlimited stamina currently to bunny hop a lot. It's a specific kind of people that does it and they make like 20% of a populated server. The thing is that I usually experience those hops when they are close to a corner, surprised in CQC or under fire on long distance being rather close to cover. While the mix of sprinting and jumping works better without a stamina bar, I don't see that too often to be honest. People consistently bunny hopping, making more than 2 jumps in a row are very rare. Those kind of bunny hops I mostly experienced won't stop with a stamina bar. So out of that estimated 20% who use bunny hops here and there, there are maybe 1-3 people who consistently bunny hop around and abuse the unlimited stamina.