The editor would be an option, you wouldnt have to use it and if its what people want why would you not include it?
Madness...if your customers request an improvement to the game then you should listen to their views and act. Like people have said before its do-able with other managerial games (which still produce game after game - Champ Man, Football Manager etc) and you could disable it for online play (presuming you know how).
I think you'll get left behind if you keep to the "this is the game now either like it or lump it"
Editors bring a whole new community together, take www.champman0102.co.uk for example. Its a site which loves a set game and brings stories together with a host of other things including challenges, hints, tips etc. All because an editor makes the game have endless possibilities.
How would i use an editor? Truly i'd put myself in as a young and up coming all rounder, adjust a few of the unreasonable stats (IMO) and maybe make a challenge where i limit Hampshires budget so the game is more of a challenge, or in a new save i may give them loads of money to try and build a "Superteam". I may Take out Notts and create a whole new team from a minor county.
I may make a new stadium with a massive capacity for some teams, or for fun overide say, Essex with Victoria for fun to see how they would do.
My point is there would be endless possibilitys with an editor, whereas now once you've mastered the game it tends to get boring.
We're definitely looking into adding increased feature depth.