U must, however keep in mind that you're talking about standing VJ..
That's why you just add some plyos. The only primary difference between the standing bilateral vert and running are the activity of the plantar flexors and eccentric contraction in the plant that occurs in the quadriceps, both of which can easily be addressed thru an exercise like depth jumps. The olifts also do a helluva job of potentiating the plyos which is why I like to have people do a set of plyos in between sets of the o-lifts.
Yeah I absolutely agree with this. When you separate the mechanics of the jump, it's pretty much the calves and quads "breaking" the momentum and the posterior chain (and sometimes the quads to a great extent in some people) providing the power to get up. In a way, I think bad posterior chain strength wrecks the amortization phase as well, since, at least in my mind, the body will compensate into trying to use the quads more which in return means they will bend more in the amortization phase (in order to load more and generate more concentric strength) which in return overloads them too much and compromises body position and de-activates the posterior chain.
They're all linked and with things like power snatches and pure hip power movements (more or less, there is "some" quad contribution probably, but you get the idea) you're also teaching the body "hey, use the hip extension more". With depth jumps, you might be going even deeper into the problems you already have if you're quad dominant.
That's why I still think depth drops actually are better than depth jumps... you can drop from higher altitudes and only focus on the eccentric part, which is (to me at least) what the focus should be in the first place in terms of plyos (yes yes there are exceptions, but I still maintain this thought).
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