Yes my suggestion is assuming you achevie a direct wired connection to the PS4 from your router
Wirelessly connecting your PS4 to your router and then connecting via the router for RP would be a worse experience almost certainly
There are however several options to give a better than wireless connection between your PS4 and router
Never say never. This is a suggestion to improve your setup but if you don't feel like spending money on it Dieh@rds suggestion to test wifi saturation/interference is your best bet
But if you're willing to spend a little money on it, a powerline adapter will allow you to basically connect your PS4 to your router via a wired connection. It's not quite a wired connection but far superior to wifi in my experience
Powerline adapters plug into electrical outlets in your house. One next to your router and the other one next to the device you want to "direct" connect. They take the wired internet signal from your router and send it across your electrical wiring in your house to provide an almost guaranteed more robust internet signal than wireless.
http://www.amazon.com/s/ref=sr_nr_n...ne+adapter&ie=UTF8&qid=1398952602&rnid=493964
You have to make sure you get two adapters as since they are flexible they can be in more than 2 instances at once thus you can use odd numbers so they tend to also sell them in single packs.
Maybe something like this for you?
http://www.amazon.com/dp/B00AWRUICG/?tag=neogaf0e-20
or
http://www.amazon.com/dp/B0081FLFQE/?tag=neogaf0e-20