Good idea to get a separate router.

If the TP-link travel router solves your connectivity problems, you might want something faster/better with a gigabit ethernet port. The travel ones are best for travel in a hotel room or to cover a small area. Also the one you bought doesn't support 802.11ac, there's a version of it that does, but if this works better, please consider something better with a gigabit ethernet port and multiple antennas for home use. Keep the travel one for travel.

What speed is your FIOS connection rated at? (What speeds do they promise at your service tier?)

-David