All MFE programs do (and should) rank your ability to communicate in English proficiently above all other skills. Since these programs are extremely competitive, nearly all applicants are really smart. Seeing as the #1 metric on "how good an MFE program is" is placement rates, it's critically important that you can land a job.
Checkout this awesome table of facts I just invented:
QUANT SKILLS | COMMUNICATION SCORE | % CHANCE OF EMPLOYMENT |
10/10 | 6/10 | ~60% |
6/10 | 10/10 | ~80% |