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Hey there! Thanks for reaching out to us! I see that you have contacted us at help@moz.com so I have responded to your ticket there Let me know if you have any other questions and I'll be more than happy to help! Have a great day! ​Eli

Hi Jeffrey, Hard to draw conclusions without knowing the website. Is the site actually 2.3 million pages or did Google deindex a bunch of duplicate or thin content? I feel this could be what is happening. Are you seeing a decrease in organic traffic and/or rankings since this happened or were these thin-content pages that were not generating any traffic? An average load time of 4 seconds is likely not the issue. It's not ideal for UX (particularly on mobile) but I have seen Google fully index websites with higher average page load times than this. Were you getting these index numbers from Google Search Console or from performing a site search? ("site:") If you want to DM me the site, I can take a closer look for you. Joe