I know you're not there yet, but don't worry about having suboptimal EV spread because of the pokerus; when you get to E16 content, you'll find EV resetting disks (for each stat) avaliable for purchase ($10000 each disk; fully resets EV on a particular stat). So you'll be able to re-train your main team to your liking.
As for Gen VII, a personal favourite of mine is Oricorio. I know it might not have the best base stats, but I love it's versatility. Being able to change freely it's type (free-ish; it costs $2000 per change IIRC) it's something quite useful.
And regarding Luna, maybe swap Meowstic for either Granbull or Florges? Other than that you're good to go!