I've had this router for a month and it ran great, speeds were top notch, repsonsive snappy experience. But lately the router seems to have issues handling my speeds where are a mere 400/400 Verizon Fios. The down is fine but the upload if awful. I can get 400 down easy, but the up can range from 40-250. I tried reading other threads about this. I turned off OFDMA and OneMesh, however the upload speed still isn't where it should be. Verizon has verified on their end that the ONT is performing as normal. I will swtich to my original to see if that true. 

Mean while I wanted to see if there were any other things I could try before I return this router.

Thanks.