It isn't just a cooldown adjustment. If you're already PVPing getting to a high rank takes a few thousand PVP matches (not counting how many you actually need to -win-.

I'm only at Rank 16. I regularly have to wait 10-20min for just one match. At this moment I've done about 250 matches with about 70% win ratio.

I'm sorry but I'm not even willing to change Grand Companies at rank 16, let alone people who have been doing it to rank 30+