I purchased a new NETGEAR Nighthawk X6 AC3200 Tri-Band Wi-Fi router when I got my new IPad Pro. This was to take advantage of the Pros 802.11ac Wi-Fi technology, and better streaming of 4K with TIVO Netflix, Fire TV, etc.
An added plus was it increased the IPad 2, speed from around 20 Mbps to 30 Mbps.
This router is expensive, but delivers, and is by far the fastest router I have used. The latest software fixed the bugs that have been reported in some of the older reviews.
For you, if your router is your weak spot, a newer router, not nessarily one as expensive as the Nighthawk, may help considerably.
As a side note, we have a 75 Mbps plan from Comcast, 90 Mbps max, the IPad Pro connected to the Nighthawk consistently clocks out at 85 Mbps, just a little less than our Ethernet connection.