Hmm, not sure. My Zeb is the Ultimate which I believe has the same air spring and damper as the Select+. I found small bump compliance very good. This upgrade noticeably improved it more, but I wouldn't say it was an extreme difference.
Perhaps your Zeb needs more tuning? I recall at first I thought my Zeb was quite harsh with small bumps. I was able to make it feel very muted over fast, small, consecutive bumps by lowering my air pressure a bit more than what I had, having very little low speed compression (LSC), and lastly, speeding up the rebound to almost fully open.