I would suggest you to keep it, and get used to play different necks. At school we had a music project, and the day we were going to perform it, I obviously didn't have my guitar with me, which I have been practicing the song on, and the crap-guitars at school has much thinner neck than my Les Paul, so it almost went wrong, if it weren't for that I had been playing a lot on my other guitar which has much thinner neck than my Les Paul. So imagine that situations like that might come up, not necessarily exactly the same, but you might get a question to play something on a guitar you aren't used to play on, and it sounds very oversensitive for people that don't know the shit about guitar and you say that you can't play because it's not exactly like your own. Versatility is very nice, so keep it and get used to it.
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i understand that the neck is little uncomfortable, but if that is ALL you dislike, you can get use to that if you give it some time 
