I played the game a lot before ranked list was changed (2 years ago or so) and that change made it so over few weeks I dropped out of the game. Holding a Custom game is somewhat difficult, it is not the answer, not many people play those and not always the made lobby features this role list. But let's remember the original Ranked role list was the most popular one for Custom games. It and Rainbow were the most common lobbies.
I speak of: Jailor, 1xTK, 2xTI, 2xTP, 1xTS (or was it 2xTS, 1xTP?), 1xRT... 1xNK, 1xNB, 1xNE... 1xAny... and mafia was either Mafioso+GF+RM or GF+MD+MS.
I talked to few people and they also noted that they liked it more than the current role list for Ranked. If the current one is more balanced (which I actually doubt) then it's fair to keep it as the Ranked role list, but giving the old one as a optional game mode without ELO, that is alternative to Classic would be really welcome.
(Here is the end of my suggestion, but I'll go into a little detail as to why I prefer it. Not really relevant to asking for both option to be available.)
4 Mafia and a lot of RT roles means a lot of games just end up being Mafia winning without effort by just having the majority vote. NK is basically a luck based role, because Town has problems reaching any conclusions. Lack of Any means no surprises, once NE is found, it is obvious there can't be another one of Exe/Jesters. It's less engaging to play and I keep track of player's roles less, because there can be up to 5 Townies of the same type. And finally sometimes the town has a really weird role list, that just isn't good; 5 TIs is just annoying to keep track of, 4 transporters is a mess and don't get me started on 4 Vigis.
Classic on the other hand is the other extreme. It is looking at the role list and basically crossing out positions. Once RT is dead, there is little place to fake a claim. There just isn't enough randomization in it and too much is set, for it to be a fun gamemode for more advanced players.