Should I get my front tooth crown remade if I feel like its too short? (photo)

The problem is not the crown but the excessive gingival tissue leading to a short squat tooth that looks like a chicklet.  The solution to correcting the smile design is to do gingivectomy and/or crown lengthening to reduce the excessive gingival display.What you are experiencing is a common problem when dentist doesn't communicate well with patients to get ideal results.

I can't tell from the pictures, but a grey shade is most likely from metal inside the crown that the porcelain is fused to. It is very difficult to block out this grey hue, because porcelain used in dentistry is somewhat translucent, as are teeth. This is one of the main reasons I use a Cerec AC machine. The crowns are milled and polished same day, while you wait, in about 1.5 hours. Best part is there is no metal and these crowns look very lifelike. If you or I don't  like how it looks, I make some changes in the software, and mill another. It takes about 8 mins to mill the crown. Google Cerec, which stands for Ceramic Reconstruction. I think you'll be interested in what you see.I also agree with Ira…Gingivoplasty, or reshaping the gum and probably a veneer on the other front tooth to match their width would help a lot. 

It is general procedure for the lab to make a single central incisor crown the same length as the adjacent central incisor.  If the case was that the lab didn't do this, it is my guess is that this was a lab error and not an error from your dentist.  However, your dentist should have shown it to you for your approval before he cemented it into place.  What I see are two different things.  One, you have more gums around the one tooth, which makes it appear shorter.  The second thing is that I agree with you, it also appears to short at the edge of the tooth compared to the adjacent tooth.To get the best result you might consider having your gums evened out first, and then the crown remade to match the adjacent tooth in size, length, color and translucency.  A perfect match is not always achievable with a single crown on a central incisor, and many times dentist will recommend doing the adjacent tooth to get the best match.Have a more in depth discussion with your dentist about this.