If so, are you reading AOI parameters? (2000 requests suggests so) These will kill performance. Read UDT members or AOI locals making sure each item within is set to have at least Read ext. Access
You hopefully didn't just drag over all of the tags from the opc browser into your project, but it’s certainly been done before… definitely don’t do that if you did.
Also, set the cip connection size to 4000 for capable hardware.