If you mean the Asus RT-AC3200 then this is a Wireless router. Some would say that its "overkill"and just get wireless access points - the Ubiquiti range is well regarded on here.
The Asus will give you good wifi but is also a way better Router than the Hub - it has more processing power and other additional features the Hub doesnt do (at all or well) - so it depends whether you want those features or arent bothered.
The Asus may or may not sort your wifi issues (dont recall what they were!) and could still lead you with "dead spots" that you might still have to get an access point as well - with the added expense - but then again you wont know until you try it. You could get the Asus and send it back if it doesnt solve the issues !
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John
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I do not work for VM. My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired 2 WiFi,) SH2 in modem mode with Airport Extreme Router. On VIVID200, Talk Anytime Phone, x2 Mobile SIM only iPhones.