right heres my thoughts:

to my knowledge, there is only one consistency stat that a player can have, though there are many ways a player can be in-consistant

<UL TYPE=SQUARE>passing
Dribbling
Shooting </UL> (just to name a few

although, to my knowlegde, consistancy in FM is based on game to game.

I've been thinking about adding a sort of, "in game" consistency stat, that covers they stats mentioned above

(i.e make it easy for a natural goalscorer to be re-created in the game, or for instance, Celtic's Massimo Donati, who can hit great 50yard passes, then messes up simple 2/3yard passes)

thoughts?

What you describe is already covered by Decisions, Composure and Concentration.

Interesting. Straight off, it brought to my mind Gilberto Silva, when he used to play in the Arsenal first eleven regularly. I always had the impression that for 6 months his passing was great, and then the next 6 months it was atrocious. Throughout, his defensive consistency was very good. Nowadays not even that is good...

So yes I'd say you have a point.