diff --git a/pkg/injector/injector.go b/pkg/injector/injector.go
index b0fe5ac..1ababd4 100644
--- a/pkg/injector/injector.go
+++ b/pkg/injector/injector.go
@@ -154,7 +154,6 @@ func (i *injector) handleRequest(w http.ResponseWriter, r *http.Request) {
 		}
 	}
 
-	klog.Infof("ready to write response ...")
 	respBytes, err := json.Marshal(admissionReview)
 	if err != nil {
 		http.Error(
@@ -163,13 +162,17 @@ func (i *injector) handleRequest(w http.ResponseWriter, r *http.Request) {
 			http.StatusInternalServerError,
 		)
 
-		klog.Errorf("Sidecar injector failed to inject for app '%s'. Can't deserialize response: %s", diagAppID, err)
+		klog.Errorf("Injector failed to inject for app '%s'. Can't deserialize response: %s", diagAppID, err)
 	}
 	w.Header().Set("Content-Type", runtime.ContentTypeJSON)
 	if _, err := w.Write(respBytes); err != nil {
 		klog.Error(err)
 	} else {
-		klog.Infof("Sidecar injector succeeded injection for app '%s'", diagAppID)
+		if len(patchOps) == 0 {
+			klog.Infof("Injector ignored app '%s'", diagAppID)
+		} else {
+			klog.Infof("Injector succeeded injection for app '%s'", diagAppID)
+		}
 	}
 }
 
diff --git a/pkg/messaging/extractors.go b/pkg/messaging/extractors.go
new file mode 100644
index 0000000..7f13643
--- /dev/null
+++ b/pkg/messaging/extractors.go
@@ -0,0 +1,5 @@
+package messaging
+
+func ExtractTopicFromEnvelope(msg *MessageEnvelope) string {
+	return ""
+}
diff --git a/pkg/messaging/nats/nats.go b/pkg/messaging/nats/nats.go
index e0d96ff..dd36c41 100644
--- a/pkg/messaging/nats/nats.go
+++ b/pkg/messaging/nats/nats.go
@@ -245,9 +245,9 @@ func (n *natsStreamingPubSub) Subscribe(topic string, handler messaging.Handler,
 			if err == nil {
 				// we only send a successful ACK if there is no error
 				natsMsg.Ack()
-				klog.V(4).InfoS("Message manually acknowledged in NATS")
+				klog.V(4).InfoS("Manual ack", "topic", natsMsg.Subject, "Id", msg.Id)
 			} else {
-				klog.ErrorS(err, "Error running subscriber pipeline, message was not ACK")
+				klog.ErrorS(err, "Error running subscriber pipeline, message was not ACK", "topic", natsMsg.Subject)
 			}
 		}()
 	}
diff --git a/pkg/middleware/metrics.go b/pkg/middleware/metrics.go
index c6a412d..b47c6f0 100644
--- a/pkg/middleware/metrics.go
+++ b/pkg/middleware/metrics.go
@@ -12,7 +12,12 @@ func SubscriberMetricsMiddleware() messaging.Middleware {
 		return func(ctx context.Context, msg *messaging.MessageEnvelope) error {
 			start := time.Now()
 			err := next(ctx, msg)
-			metrics.DefaultPubSubMetrics().RecordSubscriberProcessingTime(ctx, msg.Subject, err == nil, time.Since(start))
+			topic := msg.Subject
+			if topic == "" {
+				topic = ctx.Value(messaging.TopicKey).(string)
+			}
+
+			metrics.DefaultPubSubMetrics().RecordSubscriberProcessingTime(ctx, topic, err == nil, time.Since(start))
 			return err
 		}
 	}