Yes to your question.
As for it being apparent, there are a few easy ways to see what is going on. Starting with your HUD set up, you can enlarge the enemy team pannel. It shows what buffs each player has, as well as when their limit break is ready. At a quick glance, you can see "Oh, the samurai has LB ready. I should be careful about attacking them until he's used it. Or if I start attacking them, I should get ready to use my crowd control just in case." Not to plug myself or anything, but a good HUD set-up is essential to improving in PvP and I have made a guide on it here
https://www.youtube.com/watch?v=Cw26G3oqLjg for any interested.
Coming from PvE to PvP is difficult because the information which is important is so different. For example, perhaps in PvE you would rarely make use of the /focus function. But in PvP you could use /focus on an enemy to see where they are at all times, see what buffs they have, and what they are casting. Very useful information is it not? But maybe not very useful in PvE.