I really don't agree about getting one guitarist to play the parts. What is the point? It's not a true reflection of the band, and so you're effectively lying to the people who are going to be listening/buying the album!
When I hear an album, I want to hear the BAND, not the producer or engineer. Talking about ego's .....
producers are hired to make the band sound their best.. and to make a marketable product.... sorry, sometimes bands have one shit guitarist and one good one, and if you let the shit one play on rhythms as well you are not only compromising the band and their music, you are compromising your employability. i'm all for individual opinions... but yours is unrealistic at best. sorry, i will not compromise the integrity of a project i'm working on simply because a band has one guy who's better at recording good rhythm tracks than the other. music thrives in a democratic nation, but it is not itself a democracy.... it is art, and as such must be crafted.. not simply shat out. well, some modern painters might argue that point, but no reasonable band member would ever argue that just because they are nice enough to keep their buddy in the band that can't really play up to snuff, that he should be recorded. it's their choice if they want to compromise their live show... that's not my end of things.
i've even recorded bands where the person who wrote all the music is not the best, tightest player... and never once with these kinds of guys have i ever ran into ego about it.. they are happy to let the tighter player perform the guitars. there's also situations where the guy who doesn't get to play rhythms gets butt hurt..... that's life.
JUST this past weekend i had to tell a drummer, after wasting a whole day in the studio and having to pay for two days, that we (myself and the rest of the band) had decided to discontinue the session and that he was going to be replaced by a studio drummer for the album... he was bummed, but said he'd stay in the band and work on his playing. next day he quit. his loss. he could have viewed it as a hard lesson learned and as a wake-up call to the work he needed to do to bring his playing up to snuff.. and then he would have still been in the band. Rather, he decided to cut out. that bummed me out as i like the guy personally... but it was the right choice to replace him for this recording.
this kind of thing happens.. it's the nature of the business, and the nature of creating and crafting art to high standard, rather than just hitting record. hard choices sometimes have to be made, and they are and have been now and for years past. many, many albums you have and enjoy are created with this same ethic, and they wouldn't be as good and you wouldn't like them as much if they hadn't been. i've been on the receiving end of some of those kinds of choices... rough to go through, but in the end it usually works out for the best and gets the project to where it needs to be... and as long as the path to that point is paved without ill will, then all will be happy eventually.
furthermore, blah blah blah <insert more authoritative ranting here>