Will 5 port Gigabit Ethernet Desktop switch help a powerline adapter?

[_MOJO_]

While I am reasonably knowledgable in PC building, components, I am a layman in the home network knowledge category.

My home network configuration:

Router: Hitron Technologies CGN Cable Internet Modem Router WiFi Wireless Ethernet An Intel (R) 1.0 Gbps connectin

> 4 items connected to router :

1. Actiontec ECB2500C Ethernet to Coax Network Adapter (powers my TiVo and cable Box through COAX I'm assuming)
2. Desktop
3. TP-LINK TL-PA4010KIT AV500 Nano Powerline Adapter Starter Kit, up to 500Mbps
Powerline adapter connects directly behind entertainment center on opposite side of house from router/desktop

Entertainment center has XBOX ONE S, Nintendo WiiU, SteamLink, Blu-Ray Player, cable box, Smart TV


I purchased a TP-LINK 5-Port Gigabit Ethernet Desktop Switch (TL-SG1005D) in an effort to mitigate some wireless connection issues
with the XBOX, SteamLink and Nintendo WiiU (The switch is to connect all devices without having to switch cables)

My questions are this:

1. Would connecting a switch from the Powerline adapter to my devices be effective at all?

2. I know there are some routers with amazing features and high price tags- that might not be totally necessary.... My ISP router is uber basic- is another router in order?

3. Is there a "plug and play" router that would work in this configuration that can handle my family and myself streaming video, gaming,
and connecting up to two active tablets/laptops?

4. Is there another component in my configuration that might work better?

 

[nigelivey]

The only benefit will be between devices that are connected directly to the switch (communication doesn't leave the switch) anything still travelling over the powerline will be unaffected. Powerline adapters are a bit flakey as they require quality home wiring and any electrical device on the line can effect performance.