Online filing will allow eligible applicants to obtain their application info and processing queue faster than mail delivery. In addition to that, applicants/attorney will be able to communicate with the USCIS directly rather than through mail.
EProcessing does not change any of the substantive requirements for affected nonimmigrant categories. eProcessing may provide a good option for filing to extend stay and hold status in the United States in certain matters but otherwise it is always advisable to consult an Immigration Attorney especially with the case –specific questions or concern with the legal status in USA.