For EE stream, you can refer to this link http://www.welcomenb.ca/content/wel-bien/en/immigrating_and_settling/how_to_immigrate/new_brunswick_provincialnomineeprogram/New_Brunswick_express_entry/EligibilityRequirements.html
Two questions:
1. Does high Ielts score mean great communication ability?
2. Any person can improve their communication skills quickly if they want.
These are not concerns if you have a positive attitude.