1. I'd add a pommel to the end of the sword, that's what's going to counterbalance the blade (and historically, the blade tang ran through the grip, out the end of the pommel and then was melted and filed to hold the parts of the sword together).
2. You might want to add some form of guard. Depending on what look you're going for it could be a disk, cross, cup, basket, or any number of shapes. Check out some pics of real swords similar to the type you're wanting to make for details. MOST swords have some type of guard.
3. While some sword blades ARE narrower at the hilts then flare out at the base of the cutting edge however it seems from this image that for the width of the blade it seems awful narrow where it attaches to the hilts.
Other than that it seems like a good starting point for a Medieval European longsword.
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Founder X-wing Alliance Upgrade
http://www.xwaupgrade.com
SaxSoft Productions
http://saxman.xwlegacy.net
Founder X-wing Alliance Upgrade
http://www.xwaupgrade.com
SaxSoft Productions
http://saxman.xwlegacy.net