The last big change to the ASUSwrt router OS was the addition of the AiProtect and Adaptive QoS features with the release of the RT-AC87U. That review has screenshots and summaries of the features if you aren't familiar with them. Documentation of both features and features in general remains woefully inadequate in the AC3200 User Guide.
The Reviewer's Guide ASUS sent for the AC3200 doesn't shed much additional light on these features, either. But I'll pass along this write-up from that guide:
AiProtection with Trend Micro puts you in full control of internet access for each device, based on its MAC address. You can block or allow internet access based on a schedule, and assign a security level and parental controls for each device. The Trend Micro software uses a robust three-pronged approach to security -Prevention, Protection and Mitigation - that gives you state-of-the-art protections from cyber threats, hackers and malware at all times. The software safeguards security parameters like password strength; and ensures that the gateway and internal devices are not threatened by system and application vulnerabilities. It will even raise an alert when an infected device is detected.
Router security scan: scans your router for any security vulnerabilities and recommends options for improving protection.
Malicious site blocking: restricts access to known malicious websites in the Trend Micro database for always-up-to-date protection.
Infected device detection and blocking: prevents infected devices from communicating personal information and/or infected status to external parties.
Vulnerability protection: protects the router against common internet-based attacks and exploits.
Web and app filters: Keyword and URL filters to block access to unwanted websites and apps.
Time scheduling: schedule time limits for specific guest accounts and devices.
A quick scan through the AiProtection screens showed most remain the same. The only obvious difference I found was the renaming of Router Weakness Scan to Router Security Assessment on the AiProtection Network Protection tab. For testing AiProtection, ASUS provided links to websites for testing Malicious site, Vulnerability and infected device protection features. I didn't test any of these because I didn't have a machine (real or virtual) that I was prepared to sacrifice. I asked ASUS for details on what each of these features actually protects against and will include it here if I receive it,.
AiProtection Network Protection screen
The bigger difference is the promotion of the Traffic Monitor from the Adaptive QoS screen to its own Traffic Analyzer screen. This new feature comes disabled by default, but with the sample data shown below so that the screen isn't "boring" according to ASUS. So, no, you aren't being hacked by someone named Jieming.
The feature is pretty spiffy, letting you dig into bandwidth use by client and application. The Statistic screen shown below can show total bandwidth or just up or downlink, with daily, weekly and monthly time scales. However, the only way to clear data is by resetting the router to factory defaults. And you can't change sample interval because it's "related to database design", again according to ASUS.
Traffic Analyzer Statistics screen
The Traffic Monitor tab provides a picture of real-time bandwidth use or can be switched to look at daily or Last 24 hour stored data views. Again, you can't change anything here, not even disable it.
Traffic Analyzer Monitor screen
Other than these changes, ASUSwrt appears to be the same as found on the RT-AC87. So go check that review for more feature information.