There never was an ‘Issur’ of Mayim She’uvim. There were two Takanos: going into Mayim She’uvim and pouring it. It wasn’t an Issur but rather it was Metamei.
But guess what: we are already Tamei.
The closest I’ve seen to an issue is the mention in Mishmeres Shalom of the Kodenaver, that some people refrain from bathing after the Mikva since it has the title of Tumah.
Also, on Erev Shabbos there is the Arizal’s concept of trying to retain the water and not drying it.