Does Unranked Affect MMR?
No, I believe your rating will not change from unranked matches.
So new people that want to play unranked will forever be up against scrubs, even if they improve and then start farming said scrubs?
There is a different mmr in unranked and ranked arena i think.
I was wrong. Your MMR will be adjusted from Unranked play , but your ladder rank will never change from unranked play.
Here is what they said in the recent Ready Up:
“Unranked Arena will give players a safe place to play solo or with their friends in any sized group without having to worry about affecting their ladder standing. If you’re ready to move on from hot-join, or if you want to test out new builds, warm up a new profession, try out new teammates, or just chill out and have fun in a structured PvP environment, Unranked Arena is for you.
“Unranked Arena also takes advantage of all the new matchmaking changes, so you will tend to be grouped together with players of your skill level and group size.”
https://www.guildwars2.com/en/news/announcing-improvements-to-pvp-and-the-ladder-test-season/