The desktop entry uses "Name=Termial" and "GenericName=Termial Emulator".  FDO menu specification writes[1] :

    Name        Specific name of the application, for example "Mozilla".
    GenericName Generic name of the application, for example "Web Browser". 

I don't think "Terminal" can be seen as a specific name. It is a typical generic name. Also I don't think there is real difference between "Terminal" and "Terminal Emulator" to make one being specific and the other being generic. They are basically the same.

Choosing a generic name like "Terminal" as the specific name is not a good idea. That defeats the purpose of defining both "Name" and "GenericName" in FDO menu specification.

Here is what some other termianl emuelators use in their .desktop files:

xterm       "Name=XTerm"
sakura      "Name=Sakura"
konsole     "Name=Konsole", "GenericName=Terminal"
roxterm     "Name=ROXTerm", "GenericName=Terminal"
lilyterm    "Name=LilyTerm", "GenericName=Terminal"
terminator  "Name=Terminator"
guake       "Name=Guake Terminal"
yakuake     "Name=Yakuake", "GenericName=Drop-down Terminal"

(yes, gnome-terminal is not listed here because it is another bad example using generic name as its specific name. )

And here is what some other applications of XFCE use in their .dekstop files:
mousepd     "Name=Mousepad", "GenericName=Text Editor"
midori      "Name=Midori", "GenericName=Web Browser"
thunar      "Name=Thunar File Manager", "GenericName=File Manager"
squeeze     "Name=Squeeze Archive Manager", "GenericName=Archive Manager"

(I'm not a daily usef of XFCE, so I just pick a few randomly from git.xfce.org.)

So Terminal.desktop is inconsistent with FDO menu specificication, inconsistent with other terminal emulators and inconsitent with other XFCE applications.

I would suggest following the FDO menu specificication and changing "Name" to "XFCE Termianl" or something like that. That would bring better corporation, especially when XFCE terminal is used in a non-XFCE environment.

[1] http://standards.freedesktop.org/desktop-entry-spec/desktop-entry-spec-latest.html#recognized-keys