Yes, you should recreate your profile if you are interested in receiving Ontario NOI. You need to withdraw your old application and put in the same details all over again (new application, same EE profile). Negative effect could be in terms of tie-breaking rule if and when CRS drops to 432 but I don't think you should worry about that too much. I recreated my profile at CRS 436.
Hi when did you recreate your profile and have you received a NOI since that re-creation? If so, when? What is your CRS? NOC?