It took some of those picks a few months to impact their club. So immediate is slightly overstating it, but the general point that at #4 we should get someone who can contribute in 2016 is correct.There were probably 5 immediate difference makers in last year's draft - Larin, Parker, Roldan, Alashe and Matt Polster. Those 5 guys could start for almost any team in MLS. Larin, Parker and Polster would start for us tomorrow. In limited action, you could argue Shelton was also a difference maker.
At #4 you can (and should) get an immediate difference maker if you draft well.