I too use a R7000 after giving up on my Airport Extreme.
I feel the R7000 has an easier to use interface, with both simple and advanced options. Airport Utility is pretty simple to use, if your needs are simple. Where that simplicity becomes a detriment is when one DOES have to deal with more advanced issues, like routing behind some residential gateways (and watch your ISP or cable guy roll his or her eyes when they have to deal with Apple equipment vs the more standardized Netgears, D-Links, etc; not fair, but that's life), setting up with the instructions from less Apple friendly devices, etc.
Also, no external antennas. Rather limiting for certain installations.
Finally, Apple sunsets their network stuff. The old Airport Utility doesn't run on the new system software, so older Airport Expresses and Extremes that are prefectly usable are now bricked. OTOH, routers that use browser interfaces keep chugging along, and are useful for connecting drives, printers, etc etc.
Most people can, however, get by with Apple's rather meh product, if they are willing to pay the extra money for it. But one can do a lot better.