Q:
Coming Back
Sounds like you need to check this guide out:
https://forum-en.gw2archive.eu/forum/game/players/GW2-Combat-system-101-Guide/first
It will pretty much teach you Everything you need to know about Combat/Building Classes, and choosing Classes.
Good luck!
You can also contact me on Skype: DreamyAbaddon
The classes haven’t changed that much. Pretty much any class will effectively serve you in all game modes if you know how to play it. It’s more important that you find a class with a playstyle you enjoy.
However if you’re looking for “ease of use” then warrior or guardian would be good choices.
Guardian is very universal for all parts of the game. They are wanted in groups no matter which mode you play. The only thing they aren’t amazing at is solo roaming in WvW, but they aren’t terrible at it either.