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 https://i.imgur.com/DCcuUfb.jpg

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?