Yes, piecing can certainly be a chore but here's something that might help. Keep in mind that the most beautiful garment, tailored or knit or crocheted, can be ruined with sloppy or poorly done finishing.
A screwy hem in a designer original would never be tolerated by either the designer or the buyer since they would know how that would detract from the finished image. Professional finishing (which you can learn) enhances almost anything you'll create.
So, one of the most valuable things you can learn in your knitting is how to expertly and artistically finish your pieces. And there is a great deal of satisfaction in the process when it's part of the art form of the garment and not just another chore.
As a general rule, I wash and block the pieces of the garment I'm knitting before putting them together. They lie flatter and are far easier to work with. In the case of a sweater vest I'm working on now, I'll block the pieces of the garment first, attach them and THEN knit the neckband and armhole bands.
If you're having the piece finished by someone else, find out if that includes blocking, either of the pieces first or the finished piece afterwards. It might not include blocking at all. And blocking is one of the keys to a professional finish.
If you decide to tackle this yourself, you can get a set or two of "Alphabet Blocks" carpet tiles from Lowe's for about $16 and a set of smallest diameter stainless steel "tig rods" from a welding supply store for about the same. With these two things and some stainless steel T-pins you'll have everything you need to successfully block all sorts of wonder knits!
Please let us know how it goes for you!
Happy knitting (and finishing)