Hello I have a quick suggestion, most people start off with a bad laptop when they play Minecraft and they always complain about the lag near spawners. We can maybe make it so it doesn't lag for them. Stacked mobs. These things are good because you can kill the target without lagging. In factions we have a bunch of spawners and killing them by fall damage wont give you a lot of stuff but killing them with a sword with looting will. Example of stacked mobs.
I have an I3 2.4GhZ processor laptop, 4GB of RAM and a default intel graphics card. I have around 100 or so spawners on survival and get a solid 30FPS when looking at them and the mobs, and around 60 when i'm not. Players can just turn down their graphics settings if they are lagging, I know personally all mine are on fast. + I have optifine which maybe gives me 10FPS than before. As long as players are smart about their settings and know their device frame lag should never be a problem
