Pfsense QoS LAN

So I used the wizard to set up some simple QoS for my network. Seems to be working good, although sometimes when there’s a lot of Internet traffic it feels like the internal communication in the LAN network is slow/sluggish. So I created a floating rule for prioritizing the LAN traffic. See

Firsly, will this actually do anthing positive for my LAN traffic?
Secondly, is this an OK practice or is there some other way to handle the problem?