It's probably going to take them awhile before adding some more high volume coins as they have so much problems from all the new users.
I bet slower maybe but stop ..no.
Reminds me of watching Cryptsy explode in popularity.
They did still add coins even though the platform was getting overloaded.
Because they got money from new coins and it's a business.
I recall many of us saying way back fix your platform before worrying about adding new coins.
I don't know though.. just some speculation.