Reallly? are u *********** kidding me?
If you think Marauders/Sentinels are performing well, you have literally no *********** idea at all. Do you guys even look at your official Leaderboards for ranked PVP? Because if you did, you would see that the TOP RANKED sentinel/marauder is currently at rank 110. That is the BEST marauder in the entire game and he isnt even in the top 100 players! How can you say that a class is fine if that class isnt even in the top 100? His rating in solo is 1884, which is much lower than any of the other class's top ratings.
We got very big problems with knockbacks, snares, roots etc.... we need inmunitys like others melees and we need a lot of self healing or better defenses.