It's absolutely the opposite, we needed to stretch a narrow West Brom back 9. You don't play through teams who set up like that because you're playing right into their hands.
The fact you think he can't be arsed and you dislike his attitude kind of explains the the paragraph in between though
Sorry mate, but that's simply not true
Mirallas isn't a traditional winger - he doesn't hug the line and stretch teams with width, he provides an attacking threat by coming inside from wide positions. We don't have anyone in the squad, other than the two left backs, who can provide proper attacking width on the left.
Against West Brom, he would have been performing a similar role to Kone - coming inside from the left (granted, there's a perfectly good argument that he'd have been better at this than Kone). If you can give me an example of a game where he has stretched teams on the left using his natural width I'd be happy to take a look and review my opinion.
If you think his attitude over the last few years has been exemplary then you have a very different view of things than me. How many interviews has he done in the Belgian press talking himself up for a move away? The general body language (see Middlesbrough away as a great example). The ridiculous red card at Swansea when he had just got himself fit after an injury in the opening game of the season.
He's a good player and is useful in certain types of game, but against a packed defence he's arguably the attacking player in our squad I'd least want on the pitch - he doesn't have the guile or intelligence to open up a packed defence. He's a direct, pacy player who is arguably alongside Lukaku the best finisher we have, but there seems to be a clamour for him to play every game - horses for courses. Generally speaking most away games suit him and the home games against teams who are prepared to come and attack us.
Saturday will be an interesting one - I expect him to start given Cleverley's injury but West Ham are usually quite defensive and counter-attacking away from home, so I worry it won't suit him and he'll be subbed after an hour of being relatively ineffective. I hope I'm wrong.