The ERA has already expired. (it's moot anyway, the 14th and 19th already cover it.) They need to start over if they really think it's necessary. IMHO, the whole point of this is to give ammo to attack anyone who challenges the ratification.
(isn't there still a 200+ year old amendment that doesn't have an expiration date floating out there? Submitted by James Madison and something about limiting congressional pay raises)