I have also found that for UIs the best thing to do is have a staged rollout approach. Internals / Friendly users / Less friendly users / VIPs. The blast radiu

I have also found that for UIs the best thing to do is have a staged rollout approach. Internals / Friendly users / Less friendly users / VIPs. The blast radius & intensity of explosion is smaller on the earlier groups. The groups themselves need not be fixed. If you have a stakeholder/group that demanded the new features, they can be in an early wave. Inevitably they may be the ones to find defects in it, so the sooner the better.